On June 28, 2015, SpaceX’s Falcon 9 rocket carrying the Dragon spacecraft to the International Space Station suddenly exploded just over two minutes after liftoff from Cape Canaveral. The mission, known as CRS-7, was meant to deliver supplies and experiments to astronauts aboard the ISS — but tragedy struck mid-air. The cause? A small steel strut inside the rocket’s upper liquid oxygen tank failed. That tiny part was holding a helium bottle in place — and when it snapped, it triggered an overpre