奥巴马结束非洲贸易之行

U.S. President Barack Obama has wrapped up his trip to Africa and says he is convinced that with the right approach the continent's people "can unleash a new era of prosperity."

Mr. Obama left Tuesday after visiting and speaking at a once-idle power plant in Tanzania that was restarted through a joint U.S.-Tanzanian effort.

There, the president promoted his new $7 billion program to give more Africans access to electricity, with the goal of boosting the continent's economies.

He ended his week-long visit to Africa with a ceremony at Dar es Salaam airport, where he was seeing off President Jakaya Kikwete and hundreds of cheering and flag-waving Tanzanians.

Earlier Tuesday, former president George W. Bush joined Mr. Obama for a wreath-laying ceremony to honor the 11 people killed in the 1998 bombing of the U.S. embassy in Dar es Salaam.