In this Wednesday, May 8, 2013, photo, provided by Howard Hughes Medical Institute, Paul Modrich poses for a photo at Howard Hughes Medical Institute’s Janelia Farm Research Campus in Ashburn, Va. Modrich, an American, along with Swedish scientist Tomas Lindahl and U.S.-Turkish national Aziz Sancar won the Nobel Prize in chemistry, Wednesday, Oct. 7, 2015, for showing how cells repair damaged DNA, work that’s inspired the development of new cancer treatments. (Kevin Wolf/Howard Hughes Medical Institute via AP)