NASA hit by fuel leak during practice countdown of moon rocket

NASA hit by fuel leak during practice countdown of moon rocket
The launch team began loading the 98-meter rocket with super-cold hydrogen and oxygen at Kennedy Space Centre; more than 2.6 million litres had to flow into the tanks and remain on board for several hours, mimicking the final stages of an actual countdown; a couple hours into the daylong operation, excessive hydrogen was detected near the bottom of the rocket