US warns citizens ahead of President Obama's Kenya visit The US has issued a travel warning for Kenya ahead of a visit by President Barack Obama, who is due to address a summit on global entrepreneurship. The US State Department in a statement said the summit, to be held in the capital, Nairobi, from 26 to 28 of this month, could provide a target for terrorists. Meanwhile, the US State Department has urged its citizens to maintain a high level of security awareness as part of the new travel warning, which expires on July 30. Mr Obama's visit to Kenya will be his first to his father's homeland as US leader. BBC