USS Fitzgerald crash: Race to find seven missing navy crew
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Image captionThe US destroyer was guided back to base by US Navy tug boats
Image captionThe ACX Crystal appeared to make a U-turn before the collision, before rapidly adjusting course and setting off to Tokyo
Image captionThe collision left a huge gash down the right-hand side of the ship
Image captionThe damage to the ACX Crystal was less serious than to the Navy ship