Moncef Slaoui, the scientific advisor for Operation Warp Speed, looks back at the last eight months of vaccine and therapeutic development to combat the novel coronavirus. Slaoui, the former head of GlaxoSmithKline's vaccines department, tells CBS News chief medical correspondent Dr. Jon LaPook why he's not satisfied with the vaccine rollout. He shares the successes of Operation Warp Speed and lessons learned along the way. Slaoui, who is stepping down from his post, discusses how he's ensuring there is a smooth transition with the Biden administration.