A small helicopter made an unexpected and uninvited landing on the west lawn of Capitol Hill on Wednesday sparking a major security alert.
The gyro-copter was immediately surrounded by police as the bomb squad moved in.
Nothing hazardous was found but the pilot was taken into custody awaiting charges.
Earlier in the day a local newspaper reported that pilot Doug Hughes (61) planned to make the flight to draw attention to the issue of election campaign finance reform.
The security scare comes after a man shot himself dead in front of the Capitol on Saturday sparking a temporary lockdown.