NASA advisers say SpaceX rocket technology could put lives at risk

May 09, 2018

When Elon Musk and his team at SpaceX were looking to make their Falcon 9 rocket even more powerful, they came up with a creative idea -- keep the propellant at super-cold temperatures to shrink its size, allowing them to pack more of it into the tanks. But the approach comes with a major risk, according to some safety experts.