Peter Frampton performs on "CBS This Morning: Saturday"

CBS News has confirmed that an Army missile unit at Fort Greely, Alaska, is under investigation for allegations of sexual relations between officers and their subordinates, sexual harassment and fear of reprisals. Chip Reid reports.

There will be no rest for the weary residents or tornado-torn Oklahoma this holiday weekend. Vinita Nair reports from Moore, Okla.

How two extremists capable of such a gruesome attack were able to slip the net is just one of the questions facing British intelligence services. But now, as Charlie D'Agata reports, there's an astonishing claim that agents actually tried to recruit one of the men six months ago.

The National Transportation Safety Board has released a preliminary report on the commuter train crash in Connecticut. Anne-Marie Greene reports on what they've found.

Engineers and safety officials have been worrying for years about America's infrastructure, including its many long-neglected bridges. Former NTSB chairman Mark Rosenker discusses what the U.S. needs to do to get up to par.

Investigators are tying to find out how a single accident caused the collapse of a major bridge north of Seattle. And, as KIRO's Lee Stoll reports, officials are now warning it could be months before a replacement is built.