Five months after a bone-marrow transplant to treat a rare blood disorder, Robin Roberts resumed duties as co-anchor of ABC’s Good Morning America Wednesday morning, saying “I have been waiting 174 days to say this: ‘Good Morning America.’ “

Roberts’ return was billed as a very special edition, of GMA, and it included a welcome back message from President Obama and wife Michelle, whom Roberts is scheduled to interview in the next few days: “Good morning America and welcome back Robin,” Obama said.

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