00:00Why pilots fly with a bomb inches from their face. Let me explain. Look closely at the canopy of an
00:05F-35 or a Harrier and you'll spot strange zigzagging lines baked right into the glass.
00:11Those aren't cracks, they're detonating cord. Live explosives, wired inches from the pilot's skull.
00:17Here's why it's there. Fighter jet canopies are made from ultra-thick polycarbonate,
00:21built to survive a bird strike at supersonic speed. It's nearly unbreakable, which sounds
00:26great until the jet is going down and the pilot has half a second to eject. The ejection seat would
00:31fire them head first into a solid wall of unbreakable plastic, so engineers built the
00:36glass to destroy itself on command. The moment the pilot pulls the handle, that explosive cord
00:41detonates exactly one millisecond before the seat fires, but it doesn't blow the canopy apart. It
00:46cuts a precise, invisible weak line into the roof, so the seat punches straight through like paper.
00:52The glass strong enough to stop a bird at Mach speed is rigged to fail the instant a life depends
00:57on it.
