The Situation Room rundown: June 2

Romney throws his hat in the ring
One of the top contenders in the GOP presidential field makes his candidacy official in New Hampshire today, while Rudy Giuliani and Sarah Palin also hold events in the state. Will Mitt Romney fare better this time around? CNN Chief Political Correspondent Candy Crowley is there with the latest.

China hacks into Gmail?
Google says hackers based in China gained access to Gmail accounts belonging to senior U.S. government officials and military personnel. CNN's Brian Todd reports.

DNC chair speaks out on lewd Twitter photo
Wolf sits down with Democratic National Committee Chair Rep. Debbie Wasserman Schultz to get her thoughts on the controversy surrounding Rep. Anthony Weiner.

Faking a tweet?
How hard is it to tweet a photo and make it look like it's coming from someone else? CNN's Tom Foreman takes a look.

Stolen laptop leads owner to thief
An Oakland man recovers his laptop thanks to a program that snapped photos of the alleged thief. CNN Silicon Valley correspondent Dan Simon has more on this fascinating story.