Update at 4:10 p.m. ET. Blimp Is Down:
A runaway giant surveillance blimp that was tailed by F-16 fighter jets from Maryland to Pennsylvania is now down and under control, the North American Aerospace Defense Command said.
Nikki Krize, a reporter for WNEP-TV, tweeted a picture that showed part of the blimp tangled with some trees near Muncy, Pa.
NORAD said that the area of the crash had been secured and "a military recovery team is enroute."