[ame="http://www.youtube.com/watch?v=m3t9pkF31wo"]Cheering Israelis,Were they Tracking Hijackers pre 9/11 2/2 - YouTube[/ame]
Marc Perelman the reporter for the The Forward wrote the story.
A "Be On the Lookout" police report said, "Three individuals with van were seen celebrating after initial impact and subsequent explosion. FBI Newark Field Office requests that, if the van is located, hold for prints and detain individuals." "We got an alert to be on the lookout for a white Chevrolet van with New Jersey registration and writing on the side," said Bergen County Police Chief John Schmidig. "Three individuals were seen celebrating in Liberty State Park after the impact. They said three people were jumping up and down."