reactors along the country's northeastern coast. american military officials confirm that more u.s. service members were exposed to radiation today and treated with iodine. but because of the wind direction, several navy ships moved closer to the coast after initial pullback of radiation concerns two major aftershocks rattled japan today, causing buildings to sway in tokyo. food, water and heat shortages continue. correspondent adam housley has the latest. >> they is survived the fifth largest earthquake in history and tsunami that devoured everything in its path. now hundreds of thousands of survivors face nuclear exposure and health dangers that may not show for years. >> 11,000 micro-sievert is equivalent of the exposure you get a year if you live a normal life. if you stay in the place for one hour you may be exposed to 11,000. we have to watch this. >> radiation is leaking from