At least four people working on Fourth of July fireworks shows are dead from explosions yesterday/.

Three of them died from a blast on Ocrakoke Island in North
Carolina's Outer Banks. Federal agents are on scene today
investigating why the fireworks blew up as they were being unloaded
from a truck.

State police fire marshals in Pennsylvania are investigating the
death of a worker in an explosion at the start of the grand finale
of fireworks show in Quakertown.

In Merrillville, Ind., 25 people were hurt when a wooden foot
bridge collapsed as people were leaving the Fourth of July
fireworks show. About 50 people were dumped into a lake.
Twenty-five of them were hurt, though none with any
life-threatening injuries.

Authorities say the bridge was built to hold about 40 people,
but twice that many were on it when it collapsed.