The Obama Administration is facing a security environment in Iraq vastly improved over that which prevailed during 2005-2007, although still not completely peaceful or without potential to deteriorate significantly. The overall frequency of violence is down to post-Saddam low levels, yet, since May 2009, insurgents have increased high profile attacks and the Obama Administration appears increasingly concerned about Iraq's ability to maintain security. These attacks did not derail the June 30, 2009, U.S. withdrawal of combat troops from major cities and have not, to date, caused a modification of the February 27, 2009, announcement by President Obama that all U.S. combat brigades would be withdrawn by August 31, 2010. This would leave a residual presence of 35,000Œ50,000 U.S. trainers, advisers, and mentors, with these to be withdrawn by the end of 2011. The drawdown is in line with a U.S.-Iraq "Security Agreement" that took effect January 1, 2009. Despite the fact that recent high profile attacks have not stimulated a return to sectarian warfare in Iraq, some U.S. officials believe that a U.S. military presence might be needed beyond 2011 to ensure further political progress and produce a unified, democratic Iraq that can govern and defend itself and is an ...