May 20 - May 26, 2012 (127 images)

NATO heads of state pose for a group photo before a dinner at Soldier Field during the 2012 NATO Summit on May 20, 2012 in Chicago. UPI/Brian Kersey

A woman views an annular solar eclipse from the Redfield Campus of the University of Nevada Reno, on May 20, 2012 in Reno, Nevada. The eclipse reached 96% totality. UPI/Terry Schmitt

Police clash with protestors outside of the 2012 NATO Summit at the McCormick Place convention center in Chicago, May 20, 2012. Approximately 20,000 protestors marched on NATO's biannual summit. UPI/Mark Cowan

Afghanistan president Hamid Karzai (L) talks with US President Barack Obama before the start of the 2012 NATO Summit on May 20, 2012 in Chicago. World leaders are participating the the two-day event to discuss international security and issues related to Afghanistan. UPI/Shawn Thew/Pool