The largest and most powerful rocket ever built was readied and fuelled for its first test flight on Monday, but SpaceX cancelled the launch minutes before blasting off after discovering a “pressurisation” problem.
“A pressurant valve appears to be frozen, so unless it starts operating soon, no launch today,” the SpaceX founder, Elon Musk, said on Twitter. Minutes later, the launch was officially abandoned, with operators ending the countdown 40 seconds before lift-off.
