Whether security is imporving or not in Afghanistan depends on whether you are asking those that want to get out or those that have to stay.

The Insurgency in Afghanistan’s Heartland

“A little more than a year after the transfer of additional U.S. troops was completed, violence increased across the country, hitting new peaks in May 2011 as the Taliban launched their spring offensive, which resulted in the highest recorded number of civilian casualties incurred in a single month since the U.S. engagement in Afghanistan began in 2001. It is unlikely that this trend will be reversed anytime soon. Following the announcement by President Barack Obama on 22 June 2011 of U.S. plans to withdraw 33,000 troops by September 2012, it appears likely that the insurgency will push forcefully to gain more ground before the military drawdown reaches its final phase by December 2014.”

http://www.crisisgroup.org/en/regions/asia/south-asia/afghanistan/207-the-insurgency-in-afghanistans-heartland.aspx