If Al-Zarqawi died in February/March 2004, then he was not on the beheading videos from Iraq which appeared from April/May 2004. Still CIA blaims him. That is an indication that it is CIA itself or Mossad which were behind those beheading videos.
http://www.usatoday.com/news/world/iraq ... OE=NEWISVA
CIA: Al-Zarqawi identified as man who decapitated Berg
WASHINGTON - The masked assassin shown on a fuzzy videotape beheading American hostage Nick Berg is believed to be terrorist leader Abu Musab al-Zarqawi, a U.S. intelligence official said Thursday.
The voices on the tapes are "a good match" and the killer is "most probably" Zarqawi, the CIA official said.
Berg, 26, disappeared April 10 after he left his hotel in Baghdad.