BOSTON (AP) — A man was arrested Wednesday and accused of plotting an assault on the Pentagon and U.S. Capitol using remote-controlled aircraft armed with explosives — the latest of several terrorism cases to spring from federal sting operations. Rezwan Ferdaus was arrested in Framingham, Massachusetts, after undercover federal agents delivered materials he had allegedly requested, including grenades, six machine guns and what he believed was 24 pounds of C-4 explosive. Federal officials said the public was never in danger from the explosives, which it said were always under control and closely monitored.