ABC News anchor Diane Sawyer told World News viewers tonight that she is taking a new role at the division at the end of the summer, then welcomed incoming World News anchor David Muir to the set. “What a humbling day this has been for me,” Muir said, then began to reminisce about his childhood dream of being a reporter alongside Sawyer. “There have been so many stories … Bin Laden captured and killed, collecting our thoughts in Joplin,” he remembered fondly, reiterating that she is “the captain here.” He added, “You and I have so much planned.”