 The massive earthquake and tsunami that rocked Japan in March 2011 led the Department of Defense to launch Operation Tomodachi. The mission brought humanitarian aid and relief to thousands of Japanese, but also spurred questions on DOD members' exposure to radiation. The Operation Tomodachi Registry website provides location-based radiation-level estimates for the nearly 70,000 DOD-affiliated members on or near mainland Japan in the months following the disaster. Officials believe no DOD members were exposed to dangerous levels of radiation during Tomodachi. But if you were there and you want your own assessment, log on to the registry at registry.csd.dissa.mil.otr. From Washington, I'm Sergeant Todd Hunter.