Challenger

Posts below the video on social media claim it is the first destroyed British Challenger 2 tank delivered to Ukraine.
"Challenger 2 on fire" can be seen at the very bottom of the video. It's very hard to tell from just a few seconds of footage if this is actually the Challenger 2.

A former NASA astronaut who was the first American woman to walk in space has become the world's first woman to reach the deepest point on Earth.

36 years after my space walk, I became the first woman to dive to the deepest known spot in the ocean - the Challenger Deep. #WorldOceansDay pic.twitter.com/KWJxx4fBYR

— Kathy Sullivan (@AstroKDS) June 9, 2020