A policeman stands guard as the convoy of U.S. President Barack Obama drives to the State House in Kenya's capital Nairobi July 25, 2015. Obama told African entrepreneurs in Kenya on Saturday they could help counter violent ideologies and drive growth in Africa, and said governments had to assist by ensuring the rule of law was upheld and by tackling corruption. (Photo by Boniface Mwangi/Reuters)

Residents cheer as the convoy of U.S. President Barack Obama drives to the State House in Kenya's capital Nairobi, July 25, 2015. (Photo by Boniface Mwangi/Reuters)

A soldier and U.S. Secret Service agents patrol outside the hotel where U.S. President Barack Obama is staying in Nairobi July 25, 2015. Obama is visiting Kenya, his father's home country, to address the Global Entrepreneurship Summit and to meet with Kenya's President Uhuru Kenyatta. (Photo by Jonathan Ernst/Reuters)

The Marine One helicopter lands with U.S. President Barack Obama aboard as he arrives to deliver remarks at the Global Entrepreneurship Summit at the United Nations compound in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (C) and Kenya's President Uhuru Kenyatta (L) arrive onstage to deliver remarks at the Global Entrepreneurship Summit at the United Nations compound in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. Secret Service agents look on as U.S. President Barack Obama delivers remarks at the Global Entrepreneurship Summit at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) talks with a solar power businessperson at the Power Africa Innovation Fair at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (2nd R) addresses the media while talking with solar power businesspeople at the Power Africa Innovation Fair at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) talks with a solar power businessperson at the Power Africa Innovation Fair at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) and Kenya's President Uhuru Kenyatta (2nd R) take part in a roundtable with young businesspeople at the Global Entrepreneurship Summit at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama takes part in a roundtable with young businesspeople at the Global Entrepreneurship Summit at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Members of the audience look on as U.S. President Barack Obama (not pictured) takes part in a roundtable with young businesspeople at the Global Entrepreneurship Summit at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) talks with a biofuel business owner at the Power Africa Innovation Fair at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama prepares to depart aboard the Marine One helicopter from a downtown landing zone, to travel to deliver remarks at the Global Entrepreneurship Summit at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama's motorcade, with U.S. and Kenya flags affixed, sits outside as he delivers remarks at the Global Entrepreneurship Summit at the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama lays a wreath at Memorial Park on the former site of the U.S. Embassy, where al Qaeda bombed the compound in 1998 killing more than 200 people, in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A Secret Service agent (R) keeps watch as U.S. President Barack Obama (L) lays a wreath at Memorial Park on the former site of the U.S. Embassy, where al Qaeda bombed the compound in 1998 killing more than 200 people, in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A Kenyan security officer stands watch at the compound where U.S. President Barack Obama's Marine One helicopter detail waits for him, near the United Nations compound in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A crowd watches the compound where U.S. President Barack Obama's Marine One helicopter (not pictured) had just landed in downtown Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Kenya's President Uhuru Kenyatta (L) and U.S. President Barack Obama (2nd L) arrive for a bilateral meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Kenya's Deputy President William Ruto (C) joins President Uhuru Kenyatta (R) for a bilateral meeting with U.S. President Barack Obama (not pictured) at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama stifles a yawn as he waits for reporters to depart the room as he and Kenya's President Uhuru Kenyatta (not pictured) sit down to a bilateral meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A sign welcomes U.S. President Barack Obama along the route his motorcade carries him to participate in a bilateral meeting with Kenya's President Uhuru Kenyatta at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Police officers guard the route as U.S. President Barack Obama travels to participate in a bilateral meeting with Kenya's President Uhuru Kenyatta at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Police officers guard a fence along the route as U.S. President Barack Obama travels to participate in a bilateral meeting with Kenya's President Uhuru Kenyatta at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

People watch along the route as U.S. President Barack Obama travels to participate in a bilateral meeting with Kenya's President Uhuru Kenyatta at the State House in Nairobi, Kenya July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) pauses during his remarks at a news conference with Kenya's President Uhuru Kenyatta after their meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) and Kenya's President Uhuru Kenyatta hold a joint news conference after their meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Kenya's President Uhuru Kenyatta (L) listens to U.S. President Barack Obama after their joint news conference at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Kenyan staff members look on as U.S. President Barack Obama and Kenya's President Uhuru Kenyatta (neither pictured) hold a joint news conference after their meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Kenyan staff members look on as U.S. President Barack Obama and Kenya's President Uhuru Kenyatta (neither pictured) hold a joint news conference after their meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A ceremonial guard (R) looks on as U.S. President Barack Obama and Kenya's President Uhuru Kenyatta (neither pictured) hold a joint news conference after their meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) puts his arm around Kenya's President Uhuru Kenyatta as they depart after their joint news conference after their meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Kenyan staff members look on as U.S. President Barack Obama (2nd R) and Kenya's President Uhuru Kenyatta (R) hold a joint news conference after their meeting at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

U.S. President Barack Obama (L) looks on as Kenya's President Uhuru Kenyatta (C) drinks a toast to him at the end of a state dinner in Obama's honor at the State House in Nairobi July 25, 2015. Also pictured is Kenyatta's wife Margaret Kenyatta. (Photo by Jonathan Ernst/Reuters)

Mama Sarah Obama (L-R), step grandmother to U.S. President Barack Obama, his half-sister Auma Obama and Ngina Kenyatta, the mother of Kenya's President Uhuru Kenyatta, smile as presidents Obama and Kenyatta deliver toasts at the end of a state dinner in Obama's honor at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Mama Sarah Obama (C, in orange), step grandmother to U.S. President Barack Obama, and Ngina Kenyatta (R, in pink), the mother of Kenya's President Uhuru Kenyatta, look on as presidents Obama and Kenyatta deliver toasts at the end of a state dinner in Obama's honor at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A program sits on a table as U.S. President Barack Obama and Kenya's President Uhuru Kenyatta (not pictured) deliver toasts at the end of a state dinner in Obama's honor at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

Recording artist Akon attends a state dinner in U.S. President Barack Obama's honor at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A portrait of Kenya's founding father Jomo Kenyatta (L) and U.S. President Barack Obama is unveiled as Kenya's President Uhuru Kenyatta plays host to a state dinner in Obama's honor at the State House in Nairobi July 25, 2015. (Photo by Jonathan Ernst/Reuters)

A man wearing a suit and carrying a briefcase all made from the dried bark leaf of a banana tree, arrives at the Memorial Park to pay his respects shortly after U.S. President Barack Obama laid a wreath in honor of those who died after an al Qaeda attack in 1998 at the compound of the former U.S. Embassy leaving more than 200 people dead, in Kenya's capital Nairobi July 25, 2015. (Photo by Noor Khamis/Reuters)

A man wearing a suit and carrying a briefcase made from the dried bark and leaves of a banana tree arrives at the Memorial Park to pay his respects shortly after U.S. President Barack Obama laid a wreath in honor of those who died after an al Qaeda attack in 1998 at the compound of the former U.S. Embassy in Kenya's capital Nairobi July 25, 2015. (Photo by Noor Khamis/Reuters)

People on motor bikes celebrate American President Barack Obama's visit to Kenya by holding up a photo, center top, of the president and First Lady Michelle Obama in Kisumu, Kenya, Saturday, July 25, 2015. President Barack Obama heralded Africa as a continent “on the move” Saturday as he opened a U.S.-sponsored business summit in Kenya, the East African nation where he has deep family ties. (Photo by AP Photo)