US Coast Guard fires on tsunami 'ghost ship'
6 April 2012 Last updated at 02:57 BST
The US Coast Guard has used cannon to fire on and sink a crewless Japanese ship that drifted to Alaska after the 2011 tsunami.
The boat had no lights or power and was viewed as a danger to other ships.
The Anacapa gunnery ship of the 17th US Coast Guard began shadowing the empty ship on Wednesday afternoon.
Zoe Conway reports.