AL-MUNTHRIYA, IRAQ - MARCH 15: Members of the U.S. Army's First Armoured Division stand in front of a picture of the late Iranian leader Ayatollah Khomeini, which is displayed on the Iranian side March 15, 2004 at the Al-Munthriya border crossing in Al-Munthriya, Iraq. The US has begun tightening security over Iraq's 1,300km border with Iran over the weekend, as six more US servicemen were killed in attacks by forces opposed to the 11-month old occupation. Currently there are 19 legal crossing points between Iraq and Iran, but this will be reduced to three and each traveler will have to produce a passport and be registered, Paul Bremer, the senior US administrator in Iraq, announced Saturday. The number of Iraqi border guards are to be doubled to 16,000. (Photo by Spencer Platt/Getty Images)
