Just outside the fences of Miami's Metrozoo-a 740-acre park where sleek monorails glide above a faux African plain-sits a handsome two-story wooden building surrounded by tall grass. A few boards hang askew from its clapboard exterior, and the roof above its portico is held up temporarily with steel girders. To get here, we've threaded our cars through a forest of spindly pine trees to this reclaimed clearing, a journey that evokes an exciting sense of discovering something forgotten. Just outside the building's entrance, Navy Petty Officer John Smith yanks the cord on a portable generator, which coughs to life. A few lights flick on, and we head down a creaky hallway and enter a large storage room, where a slide projector sits on a table and overturned paint buckets serve as seats. It's hot in here.

We're inside what was once the headquarters of Naval Air Station Richmond, a blimp base hastily constructed in the early months of World War II. As the slide projector clatters, Naval Reserve Chief Yeoman Anthony Atwood narrates and two former crewmen, who launched on blimps near here, stand by to lend their voices to the story. The crewmen, Ford Ross and James Sinquefield, have joined a small band of enthusiasts organized by Atwood who want to restore the headquarters building and convert it into a museum.

As Atwood talks, his hands make shadows on the sepia-tinted photos flashing on the wall. "Richmond was eventually home to 25 K-series blimps, three hangars, and 3,000 men," he says. "The hangars were 16 stories tall, built of Douglas fir brought in by train. The blimps protected ship convoys in the Florida Straits, and [Richmond] was the headquarters for the fight against Nazi U-boats operating in the Caribbean."

Ford interrupts: "That's not a K-type blimp, Anthony, that's an M-type."

Atwood rolls his eyes. "Okay, okay, as I was saying...," he says.

The story proceeds, and the enthusiasm brims. Atwood, Ross, and Sinquefield tell me that except for this building, the only other above-ground remnant of the base is one of the massive hangars' corner pillars, which stands about 300 yards away. But other clues to the site's past are around, if you look carefully. Directly outside the building under the relentless sub-tropical undergrowth, Atwood's volunteers found a four-foot-wide Marine Corps emblem the Marines had placed next to NAS Richmond's flagpole. And the old ramp is in plain view-it's now part of the parking lot at the zoo. Families who've come for a nature experience exit their minivans where ground crew released the mooring lines that sent the lumbering blimps on their lonely patrols for German U-boats.

Shortly after the attack on Pearl Harbor, enemy submarines began bringing the war close to the U.S. mainland. In late 1941, a Japanese submarine shelled a highway outside Santa Barbara, California, and on the Atlantic coast, U-boats would sink 574 U.S. and Allied merchant ships in 1942. When the war began, the U.S. Navy had only 10 blimps capable of coastal anti-submarine patrols. Soon more than 200 would join the fleet.

Most of them were K-type airships, powered by two Pratt & Whitney R-1340 Wasp engines, which gave them a top speed of 77 mph. Their envelopes were three-ply cotton bags impregnated with rubber or synthetic neoprene. The interior was coated with paraffin to make it leakproof. Most of the K-ships were 252 feet long and held as much as 456,000 cubic feet of helium. But when deflated, the five-ton envelope could fit into a shipping box 12 feet long, six feet high, and six feet wide.

Fleet Airship Wing Two was formed at newly built NAS Richmond to cover the Caribbean. On July 18, 1943, K-74 and K-32 lifted off their concrete pads and rose over south Florida for a routine patrol. K-74 was headed for the upper keys, while K-32 was to fly farther out to sea, turn south toward Key West, and finally head north again. Later that evening, both airships would be in position to keep watch over a tanker and freighter scheduled to pass from the Gulf of Mexico through the Florida Straits to the open Atlantic.

Blimp patrols were mind-numbingly boring, lasting as long as 12 hours. Armed with a single .50-caliber machine gun and four depth bombs hanging from racks beneath their control cars, the craft were hardly intended for heavy combat. Their crews were ordered to monitor the positions of friendly ship traffic and report any sightings of U-boats, which could then be attacked by warships, if any were in the area, or by fighters from Naval Air Station Key West.

K-74's skipper, Lieutenant Nelson Grills, commanded a crew of nine: co-pilot Jay Jandrowitz, navigator Darnley Eversley, mechanic J.L. Schmidt, bombardier Isadore Stessel, radiomen Robert Bourne, J.M. Giddings, and John Rice, gunner G. Eckert, and seaman J.W. Kowalski. As the craft took up its station over the straits, U-boat U-134 was running on the surface and recharging its batteries, its crew on deck enjoying the fresh night air. The blimp's crewmen first saw two blips on their radar, clearly the merchant ships they were monitoring. Then, near midnight, they saw a third blip. They moved forward to investigate. And there it was: a German submarine, on the surface and headed in the direction of the two merchant ships. There was no time to marshall aircraft to intercept the sub. Grills descended to 250 feet and opened the throttles to bring the blimp to its maximum speed.

"We were in a tough spot...," Grills told Anthony Atwood in 1997. "We decided that the best we could do was see if we'd draw fire. We felt that saving those ships was worth the blimp."

The German crew saw K-74 and opened up from the conning tower with a 20-mm cannon. Grills' crew returned fire. As the blimp passed over the submarine, the sub's deck gun shot up its envelope and damaged its engines, which caught fire. According to Atwood, the crew released their depth bombs, but as the airship's aft section passed by the submarine, K-74 took more fire and began to lose altitude. Within minutes, it settled into the waves and U-134 slipped away into the night.

The crewmen scrambled out of the control car's hatches and inflated their life preservers, but their raft floated away before they could board it. Within minutes, one of the merchant vessels K-74 had been monitoring cruised past, oblivious to the recent battle. Its sailors didn't see the blimp's crewmen in the water, clinging to each other to stay together. Radioman Bourne had managed to send a message to Richmond before the blimp went down, and by morning, a rescue aircraft spotted the men and directed a rescue ship to pick them up. But Isadore Stessel had become separated from the rest, and as he waved to the aircraft, he was attacked and killed by a shark. Grills had become separated too. It wasn't until later that evening, after spending close to 20 hours in the water and fending off another shark, that he was finally spotted by K-32 and rescued.

Grills and his crew were initially under a cloud of disapproval for attacking the sub against orders and for the loss of the blimp. But after the squadron commander interviewed the crew, Grills, and later the rest of the crew, received the Purple Heart. It wasn't until 1961-after analysis of German records revealed that K-74 had damaged U-134-that Grills received the Distinguished Flying Cross.

Still, vindication for one member of the crew was slower in coming. It took 40 years for the Navy to give a commendation medal to Isadore Stessel's family. "It was a bunch of 19- to 20-year-old kids in a blimp risking their lives," says Saul Stessel, Isadore's cousin. "They did damage that sub-the radio contacts give evidence that the blimp hurt them and they could not submerge. It was [later] attacked by a Navy Avenger [torpedo bomber], and it got as far as Spain until it was attacked by a [Royal Navy] Liberator and sunk."

The shootdown of K-74 is the only recorded combat loss of a blimp during the more than 500,000 hours of patrols flown worldwide during the war.

The sawgrass is whipping through the open windows of a Hummer, the civilian version of the burly military Humvee. Alan Crockwell, an amateur historian who volunteers his time to a growing effort to preserve Richmond's headquarters building, guides the vehicle to a flat table of asphalt surrounded by pine trees. We've parked where one of Richmond's three blimp hangars once stood-massive 1,086-foot-long structures made of wood beams and hung with sliding iron doors, whose graceful roofs arced to 183 feet.

As the war drew to a close, the base's K-series blimps were joined by new M-series ships that the Navy tested here. But in September 1945, scarcely two months after the war was over, the base was called upon once again to face down an enemy lurking at sea-a hurricane tracing a lazy path through the Caribbean. At the time, hurricane prediction was a shaky science at best-all that was known was that the storm would likely strike the state, but it was unknown where it would come ashore. Military aircraft-Grumman F6F Hellcats, Corsairs, and P-51 Mustangs, among others-were flown from nearby bases and from the deck of the USS Guadalcanal to the refuge offered by NAS Richmond's sturdy and cavernous blimp hangars.

The storm came ashore on the mangrove-entwined coast of south Florida, cut a swath across southern Dade County, and tore through Richmond NAS. The hangars, which stood close together and were stuffed with blimps and hundreds of fighters and bombers, withstood the winds. But one of them caught fire, perhaps from a short circuit. Witnesses reported seeing the winds drive flames horizontal, and eventually all three hangars were ablaze, lighting the night sky with burning wood, aircraft, and fuel. When the rain stopped, only the smaller buildings and the hangars' concrete corner pillars were standing.

Crockwell kneels and picks up a few oddly shaped glass beads from the asphalt pad. Others are melted irregularly into the surface, interspersed with a few metal fragments.

"You can really get a sense of how hot the fire was," says Crockwell. "These beads are all that's left of the windows. We find a lot of other fragments of glass and metal around-pieces of aircraft and airships."

Crockwell motions to the overgrowth next to the pad. "One of the legends of the place is that after the war was over, they dug big pits and pushed the aircraft parts into them," he says. "It's enticing to think that somewhere out here there may be pits full of World War II aircraft parts. Some of the oral accounts tell us that after the fire, you could buy a P-51 for $50."

As the Navy cleared the wreckage of the base, a demolition team dynamited the concrete pillars. One refused to fall. Now one of the highest structures in southern Dade County, it's bristling with antennas and is the central relaying station for the area's 911 service. Blimps never returned permanently after the storm, but the base's helium plant continued to supply Navy airships for years. Richmond's other buildings served a variety of uses, such as providing classroom space for servicemen going to school under the G.I. Bill, and later as space for Naval and Marine Corps Reserve units. The end came in 1992, when hurricane Andrew leveled all except the headquarters and that single, stubborn pillar.

Today, Anthony Atwood and his volunteers hope to give the HQ building its final assignment, as the official all-service military museum and memorial of south Florida. Atwood, a former Navy recruiter on temporary recall at a reserve station, has made the salvation of Richmond's headquarters building and the memory of the blimps and crews that flew here his own crusade, and intends the story of NAS Richmond to be the subject of his master's thesis for an advanced degree in history.

The year before the city of Miami's centennial in 1996, Atwood says, "there was a lot of community consciousness raising, and being a community-activist-type person, I [wanted to organize] a commemorative event at the site of the old blimp base." To honor U.S. servicemen, Atwood put together a ceremony that attracted 300 people and raised an American flag where NAS Richmond's flagpole once stood.

Bolstered by the turnout, Atwood and a core of volunteers set up a display about the base at the nearby Goldcoast Railroad Museum. As the group began to publicize its efforts, members placed on display in the headquarters building artifacts they found nearby, including aluminum fragments from the blimps and structural parts of the hangars. More volunteers came forward, some of whom had been blimp crewmen or had served at the base as civilians, and gradually the idea of restoring the HQ building took hold.

"I'd like to see this as a federal institution-an ongoing museum for young and old alike," Atwood says. "We hope to see a veterans' memorial, nature trails behind the building, and a replica of the Vietnam [memorial in Washington, D.C.] wall."

Before restoration, however, a few problems with the building's location must be solved. Although the Army Corps of Engineers owns both the building and the land around it, nearby land is owned by the University of Miami, which has its own plans for expansion, and access to the old base is limited. The solution is to raise the building by hydraulic jacks and truck it about 350 yards to a plot of federal land accessible from the neighboring Metrozoo's main entrance road. Atwood has enlisted the help of several Florida politicians, including U.S. Senator Bob Graham and Representatives Carrie Meek and E. Clay Shaw Jr., to steer the project through the competing priorities of a major university, federal agencies, and one of the largest zoological parks in the nation. Mayor Paul Novack of Surfside, a town just north of Miami, has been a key ally. "In this place, the museum would be a natural buffer between the zoo and [nearby] development," Novack says. "And when the building is moved, the land behind it will be restored to a natural state."

"It's just the right thing to do," says Atwood, whose father hit the beach on D-Day during World War II and who has the conviction-and salesmanship-of a military recruiter. Even though negotiations have been long and complicated, they have resulted in what he calls "a strange coalition of environmentalists and military people slightly to the right of Attila the Hun."

Once the officials have inked the deal and the structure is moved to its new home and restored, NAS Richmond's headquarters building-survivor of war and at least five hurricanes-will return to service, reminding its visitors that long before exotic animals roamed nearby, blimps prowled the skies.

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