A soldier stands guard outside a polling station during
presidential elections in the Mauritanian capital, Nouakchott, in
this Nov. 7 file photo. The United States has received information
of threats against American interests in West Africa's Mauritania
and Senegal, a U.S. State Department official said, and has
dispatched a U.S. anti-terror team to help the region's governments
guard porous desert borders against Islamic extremists.