Police look for cover during a violent clash between pro-Russian activist and pro-government supporters during a rally and march on April 28, 2014 in Donetsk, Ukraine. Several people were injured when the pro-Russian activists attacked a pro-government march. (Photo by Scott Olson/Getty Images)
Chicago-based Getty Images Photographer Scott Olson has been documenting rising tensions in Eastern Ukraine. He was in Donetsk during a violent clash between pro-Russian activists and pro-government supporters.