A Japan Air Self-Defense Force CH-47 Chinook helicopter collects water from the ocean to drop on the reactors at the Fukushima Daiichi nuclear plant in Fukushima March 17, 2011. Operators of the quake-crippled nuclear plant in Japan again deployed military helicopters on Thursday in a bid to douse overheating reactors, as US officials warned of the rising risk of a catastrophic radiation leak from spent fuel rods. [Photo/Agencies]