ປ.ສະຫະລັດ ຊອກຫາທາງ ຂະຫຍາຍການຄ້າ ກັບອາຟຣິກາ

President Barack Obama is on a three-nation visit to Africa designed to reinvigorate America’s relationship with the continent. As VOA correspondent Meredith Buel reports from Washington, Obama is following in the footsteps of recent U.S. presidents who have focused on Africa, even after leaving office.