DONETSK, UKRAINE - MAY 01:  Police officers huddle for safety under their riot shields while surrendering to pro-Russian activists who overran the prosecutor's office, which they were guarding, on May 1, 2014 in Donetsk, Ukraine. A short while later as many as 1000 activists marched to the office and overran the police who were guarding the building. The activists took control of the building and confiscated the police riot gear before setting the officers free.  (Photo by Scott Olson/Getty Images)