Many people saw President Obama’s trip as a response to China’s heavy investment in Africa. Observers say America needs to have a bigger economic role in the continent.

During the weeklong visit, the Obama family also visited Robben Island in South Africa. That is the prison where former South African president Nelson Mandela spent 18 years. He was imprisoned for fighting to end the country’s apartheid regime.

Mr. Obama also joined former president George W. Bush in Dar es bombings of the American embassy there.

Reporter Michael Shear wrote in the New York Times that the president’s critics say he missed a chance to visit countries that are creating problems.

For instance, critics say he could have visited Kenya, whose president has been charged with crimes against humanity by the International Criminal Court. Or, he could have gone to the Republic of Congo and talked about ending the country’s long history of violence.

Aides traveling with the president reportedly said the trip was designed to show positive opportunities in Africa.

One positive opportunity in Africa is the chance for young people to come together and make music. Mario Ritter brings you the story of some South African singers and dancers who share their knowledge with American students.

Bokamosa Youth is the name of a South African organization. For over 10 years, about 20 Bokamosa members have spent a month at a high school and college in the United States.