FILE - In this May 31, 2009 file photo, an employee works at the Tawke oil fields in the Kurdish region of northern Iraq. Iraq sits atop the world's fourth largest reserves of conventio

 

              FILE - In this May 31, 2009 file photo, an employee works at the Tawke oil fields in the Kurdish region of northern Iraq. Iraq sits atop the world
FILE - In this May 31, 2009 file photo, an employee works at the Tawke oil fields in the Kurdish region of northern Iraq. Iraq sits atop the world's fourth largest reserves of conventional crude, or about 143 billion barrels, and oil revenues make up 95 percent of the state budget. Kurdish officials claim their region holds 45 billion barrels, though that figure cannot be confirmed independently. (AP Photo/Hadi Mizban, File)
Tags: Iraq