Robin Roberts of 'GMA' to begin medical leave next week

"Good Morning America" co-anchor Robin Roberts said this morning that Friday will be her last day on the air for an undetermined period of time following a bone marrow transplant for myelodysplastic syndrome, or MDS. As always, Roberts shows courage and grace in this clip,and a bit of humor too: Check out her dog K.J., whom she had to leave with friends...Meanwhile, this week ("GMA" also announced) will be devoted to Roberts' "journey" to this point. Take a look: