Nasa has taken another crack at fuelling its giant moon rocket after leaks halted a initial dress rehearsal and delayed the first lunar trip by astronauts in more than half a century.
For the second time this month, launch teams pumped more than 700,000 gallons (2.6 million litres) of supercold fuel into the rocket atop its launch pad at Kennedy Space Centre in Florida.
Engineers counted all the way down to the half-minute mark as planned, then turned back the clocks to run through the final 10 minutes again.
Nasa completed the test late at night and said there was minimal hydrogen leakage, well within safety limits.
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