Grand Canyon visitors and employees may have been exposed for years to radiation

GRAND CANYON NATIONAL PARK -- Tourists and employees may have been exposed to dangerous radiation levels at the Grand Canyon, federal officials said.

Three paint cans stored in the Grand Canyon National Park's museum collection were full of radioactive uranium for decades. The cans have been removed after being discovered.

However, according to the park's safety director, thousands of people were possibly affected. The director alleged that nothing was done to warn park workers or the public.

A public affairs specialist said the park is working to investigate and the area is now safe.