Paul Kaluku Lima 48, a survivor of the August 1998 U.S. embassy bombing, sits on his wheelchair as he protests outside the memorial park ahead of a scheduled state visit by U.S. President Barack Obama, in Kenya's capital Nairobi July 24, 2015. Obama departed for Kenya on Thursday, his first trip to his father's homeland as U.S. president, kicking off a swing through Africa that will also include a stop in Ethiopia. REUTERS/Thomas Mukoya Stock Photo