About 100 U.S. Navy sailors who stared down a nuclear meltdown in Japan are now facing life-threatening illnesses, and they say radiation poisoning is to blame.

Lt. j.g. Steven Simmons told Greta Van Susteren that he used to be an avid hiker who did P90X workouts. Now, he said he has a “laundry list” of health problems.

Should Americans Be Worried About Fukushima Radiation?

Simmons was among the sailors who responded to a 2011 earthquake and tsunami that struck Japan and caused a nuclear power meltdown at Fukushima.

First responders have reported illnesses that range from cancer to bleeding to hair loss.

Japan Increases Nuke Crisis Severity Level to Match Chernobyl

The sailors are now suing Tokyo Electric Power Company because they claim it hid the truth about radiation leaks.

Watch Simmons’ full interview above.