As the nation reflects on the lessons learned from the Sept. 11, 2001 terror attacks, one area often overlooked is the security of America's hospitals.

Many materials that terrorists could use to create bombs are too easily accessible in hospitals, according to a new report by the Government Accountability Office.

Hospitals often use equipment that contains radioactive material to treat cancer patients. But according to today's reports, 26 of the 1,500 hospitals that have high risk radiological sources don't secure them properly.

"Although we realize how important these facilities and equipment is, it has to be secured," Gene Aloise, with National Resources & Environment, said.

One hospital had a device containing potentially lethal radioactive materials stored behind a door with a combination lock. The combination was clearly written on the door frame.

The GAO warns that in the hands of terrorists, these materials could be deadly.