Stunning slo-mo footage of hummingbirds hovering in air.

The focus of the investigation into the crash of TAROM 371 on March 31, 1995 turns to the soundness of the pilots—everything from their experience level, to their medical and mental well-being is examined.

Were Tarom Flight 371 pilots fit to fly? (2:29)

Just before it crashed on April 4, 1994, the captain of KLM Flight 433 reported an oil pressure alarm. But investigators found no evidence of a problem—so how do we explain the discrepancy?

How an oil pressure alarm misled pilots (2:58)

NTSB investigators scramble to interview eyewitnesses to the August 7, 1997 crash of Fine Air Flight 101. Two people confirm that flames were coming from one of the engines, just before the crash.

Eyewitnesses report a fire in one of Flight 101's engines (2:06)

It's a special day for the HMS Queen Elizabeth: the first landing of a Royal Navy helicopter on her flight deck. Her crew work tirelessly to ensure there are no setbacks.

The HMS Queen Elizabeth prepares for the first landing of a Royal Navy helicopter on deck (3:29)

Testing the F-35B Lightning involves three different groups of people aboard the HMS Queen Elizabeth: British Royal Navy aircraft hands, civilian scientists and American maintainers from the Integrated Task Force.

The different teams involved in testing the F-35B Lightning (3:27)

On the eve of the moon mission, NASA faced a protest by a group known as the Poor People's Campaign. Their objection: $3 billion was spent on the Apollo mission, while poor people in the U.S. went hungry.

This group protested America’s bid to put a man on the Moon (2:12)

Edward Dwight Jr. was an ace combat pilot with a top aeronautics degree and 2,000 flying hours under his belt. In 1962, he was announced as a candidate to become America's first Black astronaut.

Ed Dwight Jr. was set to become America’s first Black astronaut (3:23)

After two weeks of testing, it's time to up the ante for the Royal Navy's F-35B Lightning fighter jets. They'll be put through stricter and more demanding conditions—including flying around-the-clock.

The tests for the F-35B Lightnings are taken up a notch (2:47)

Investigators determine that on the night of January 7, 1994, conditions were moderately icy around Port Columbus International Airport. But if other planes were able to land, why did Flight 6291 crash?

Was icy weather a factor in this plane's fatal crash? (2:10)