Authorities at Boston's Logan Airport have said a security incident on a passenger jet was not related to yesterday's bombings.

Madonna soldiered on with her US tour this week, appearing onstage in Boston, Massachusetts just hours after news of her divorce was confirmed by her publicist.

A Delta flight from Boston's Logan Airport to Florida was aborted before takeoff today after a passenger demanded to be let off and made a threat.

A man who had explosives in his shoes had to be subdued by fellow passengers on a flight from Paris to Miami.

The Pentagon on Saturday dubbed the U.S. military's increased role in homeland defense and support for civil authorities "Operation Noble Eagle."