The latest violence in Afghan has raised doubts about the U.S. strategy. Here, Afghan demonstrators shout anti-U.S. slogans as they carry a wounded man during a protest in the Western city of Herat on Feb. 24. Aref Karimi /AFP/Getty Images hide caption

itoggle caption Aref Karimi /AFP/Getty Images

In Herat, Afghanistan, on Friday: Demonstrators shouted anti-American slogans. Aref Karimi/AFP/Getty Images hide caption

itoggle caption Aref Karimi/AFP/Getty Images

An Afghan policeman aims at protesters by a burning police truck set alight during an anti-U.S. demonstration on Friday over burning of Qurans at a U.S. military base in Afghanistan. Hoshang Hashimi/AP Photo hide caption

itoggle caption Hoshang Hashimi/AP Photo

Afghan demonstrators burn an effigy of President Obama and shout anti-U.S. slogans in the eastern city of Jalalabad on Wednesday, Feb. 22. Afghans have been rioting for three days after word that several Qurans were desecrated at a NATO base. The U.S. says the burning of the Qurans was accidental. Noorullah Shirzada/AFP/Getty Images hide caption

itoggle caption Noorullah Shirzada/AFP/Getty Images