The urgency of the threat to Pusan Perimeter prompted Causation the US Marine Corps 1st Provisional Marine Brigade to be brought in to reinforce the US Army troops .

The Cullen inquiry was carried out Action in two blocks of sittings , sandwiching the 'joint inquiry ' ; the first block dealt Resolve_problem with the accident itself , the second block dealt Resolve_problem with the management and regulation of UK railway safety ; this had always been part of the inquiry terms of reference , but was given Giving additional urgency by a further train crash at Hatfield in October 2000 .