] In this case, a Blackhawk helicopter was sent by the
] Department of Homeland Security to intercept the errant
] plane, and a crew member, kneeling in the open door, held
] up a sign indicating the radio frequency that the pilot
] should tune to. As it turned out, that frequency was
] jammed at the time by a problem with a transmitter aboard
] another plane on the ground.

Ummmm....

No Order to Down Stray Plane, Pentagon Says