UMAR MANDAN, IRAQ - JUNE 13: A US soldier stands watch duing tri-patite presence patrol, on June 13, 2010, in Umar Mandan, Iraq. Iraq faces multiple challenges in the lead-up to the drawn-down of US forces in Iraq, with reports claiming while they are capable of handling home-grown problems, but are a long way off being able to tackle external threats. Political wrangling has reportedly fostered greater instability throughout the country with fears of renewed sectarian violence breaking out as insurgents set-up attacks in an attempt to exploit vulnerabilities amongst the populace. (Photo by Warrick Page/Getty Images)