
Rita Jeptoo, of Kenya, crosses the finish line to win the women's division of the 2013 running of the Boston Marathon in Boston, Monday, April 15, 2013. (AP Photo/Charles Krupa)

Defending champion Wesley Korir, of Kenya, warms up prior to the start of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (AP Photo/Stew Milne)

Defending champion Wesley Korir, of Kenya, warms up prior to the start of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (AP Photo/Stew Milne)

Police from the General Service Unit (GSU) patrol on a street in Kisumu, Kenya, on Sunday, March 31, 2013. Kenyan police deployed forces Sunday in the capital and in the lakeside city of Kisumu, where two people were killed and five seriously injured in riots on Saturday, to contain the continuing threat of violence, officials said, but the country remained mostly peaceful after a high court upheld Uhuru Kenyatta's election as president. (AP Photo)

Police from the General Service Unit (GSU) patrol on a street in Kisumu, Kenya, on Sunday, March 31, 2013. Kenyan police deployed forces Sunday in the capital and in the lakeside city of Kisumu, where two people were killed and five seriously injured in riots on Saturday, to contain the continuing threat of violence, officials said, but the country remained mostly peaceful after a high court upheld Uhuru Kenyatta's election as president. (AP Photo)

In Nairobi's Korogocho slum, one of Kenya's most dangerous areas, elderly women practice self defense moves. Elderly women in slums are increasingly being targeted by rapists. Officials say the rapists believe that attacking the older women can cure AIDS. Some believe that it will bring them good fortune, while others think it will cleanse their sins. (Associated Press)

A white rhinoceros grazes in Nairobi National Park in Kenya. Africa’s rhinos are being killed in record numbers for their horns, and the problem is especially dire in South Africa, which contains about 90 percent of the rhinos on the continent. Poaching there has soared from 15 a year in 2007 to 588 so far this year. Asians, especially Vietnamese, pay the equivalent of the U.S. street value of cocaine for the horns, whose keratin is reputed to cure cancer and also ease hangovers and fever. (Associated Press)

A white rhinoceros grazes in Nairobi National Park in Kenya. Africa’s rhinos are being killed in record numbers for their horns, and the problem is especially dire in South Africa, which contains about 90 percent of the rhinos on the continent. Poaching there has soared from 15 a year in 2007 to 588 so far this year. Asians, especially Vietnamese, pay the equivalent of the U.S. street value of cocaine for the horns, whose keratin is reputed to cure cancer and also ease hangovers and fever. (Associated Press)

Sarah Obama (center) urged her stepgrandson, President Obama, to “take the great job that people have given to you and lead them well.” She was married to the president’s late grandfather and lives in Kogelo, in western Kenya.