A U.S. SFOR soldier lays barbed wire while two Bosnian Serb policemen (R) look on at a checkpoint in Brcko on August 28. Tension in the eastern Bosnian town continues to be high after hundreds of Bosnian Serbs pelted U.S. peacekeeping troops with stones in response to the ousting of hardliners from a local police station in a continuing power struggle between Serb factions.