The New York Times' Ryan McCarthy becomes Vice News editor-in-chief while Jason Mojica heads a forthcoming nightly TV show.
Havens will oversee the company's overall digital strategy.
He will lead the organization's daily newscast on HBO.
The magazine's deputy editor, Ellen Pollock, will take the reins.
The package was originally commissioned as a single-topic issue of the magazine that would consist of multiple articles. But
Also: Lola Ogunnaike pre-games the Letterman-McCain matchup on Thursday (a "win-win" for Letterman), plus each panelist's