WASHINGTON -- The Pentagon has launched an investigation into whether the White House released classified information about the killing of Osama bin Laden to a Hollywood filmmaker who had planned to release a movie about the successful raid just weeks before the 2012 election.Rep. Peter King (R-N.Y.), chairman of the House Committee on Homeland Security, announced Thursday that the Defense Department has heeded his request that its inspector general look into a published report that the Obama administration gave "top-level access to the most classified mission in history" to Sony Pictures and filmmaker Kathryn Bigelow.