Castro — who had an inside seat to the Cold War — has long expressed suspicions of back-room plots. He has raised questions about whether the Sept. 11 attacks were orchestrated by the U.S. government to stoke military budgets and, more recently suggested that Washington was behind the March sinking of a South Korean ship blamed on North Korea.
Estulin's own website suggests that the 9/11 attacks were likely caused by small nuclear devices, and that the CIA and drug traffickers were behind the 1988 downing of a jetliner over Lockerbie, Scotland, that was blamed on Libya.