"They" never, NEVER, NEVER do what you just accused them of! NEVER!! Why, why, why can't you figure something so simple out?
Find me an example - just one - of the U.S. government declaring Zawahiri, Bin Laden or Zarqawi as having been killed. Just one.
I HOPE THEY FIND ENOUGH OF HIM TO BURY HIM FACE DOWN AND LEAVE HIS RUMP STICKING OUT, SO THEY'LL HAVE A FEEDING TROUGH FOR THE CAMELS!