FILE - In this May 28, 2013, file photo, riot police use pepper gas to disperse demonstrators protesting against the cutting down of trees in the center of Taksim Square in Istanbul, Turkey. During the height of Turkey's summer of upheaval, more than a dozen Turkish doctors interviewed by The Associated Press say authorities assaulted them with tear gas, pressured them to reveal the names of patients and ignored calls for resources. (AP Photo/Emrah Gurel, File)