Food Network denies link to Liberty Bell scare

Emergency equipment is seen on the street outside the Liberty Bell Center, left, and in view of Independence Hall, center top, in Philadelphia, Thursday, May 20, 2010. FBI spokesman J.J. Klaver says testing is being done on the a suspicious white powder found inside a balloon in the building that houses the Liberty Bell. (AP Photo/Matt Rourke)

May 21, 2010 7:18:42 PM PDT
Police are investigating the source of a powder-filled balloon that forced the evacuation of the Liberty Bell Center in Philadelphia.