Protestors Hit The Pittsburgh Streets During G-20 Summit(Recep Tayyip Erdogan)

Riot policemen arrest a woman detained during a protest against the G-20 Summit early on September 25, 2009 in Pittsburgh, Pennsylvania. Riot police with attack dogs turned out in force to quell the protest. U.S. President Barack Obama greeted world leaders the previous evening to kick off the two-day G-20 summit at Pittsburgh's convention center aimed at promoting global economic growth.

( - Photo by John Moore/Getty Images North America)