A skater holds on a motorcyclist at the decorated main roundabout where U.S. President Barack Obama is expected to drive past, during his three-day state visit 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/Noor Khamis