July 17, 2018 Johannesburg, South Africa PRESIDENT OBAMA: (Cheers and applause.) Thank you. Thank you so much. Thank you very much. Thank you. Thank you so much. (Laughter.) AUDIENCE: Yes, we can! Yes, we can! Yes, we can! PRESIDENT OBAMA: Thank you. To Mama Graça Machel, members of the Mandela family, the Machel family, to ...