Al-Qaeda vows revenge as they mourn Osama bin Laden's death

Pakistanis mourned the death of Osama Bin Laden and have vowed revenge.  A surprising source, Al Qaeda, now confirms Bin Laden's death.

A statement on militant web sites says: "happiness will turn to sadness" and warns a new audio message from Bin Laden, recorded in the week before he was killed, will be made public soon."

Meanwhile, U-S officials say evidence from Bin Laden's compound confirms a plot in the early stages against American targets.  Officials say he was exploring derailing a train.  "If a train would derail off a bridge, hundreds of people could be killed which would have the same effect as blowing up an airplane," Dick Clarke CIA, former National Security official, said.

Analysts at Fort Campbell, Kentucky continue to pore through more documents and computer files from that raid.  President Obama will get the story firsthand from the Navy SeaLs who carried it out.

Copyright 2011 KTRE. Information from ABC News was used in this story.  All rights reserved.