08.05.1312:12 PM ET

Samantha Power Joins Twitter

She is the new U.S. ambassador to the U.N.

First Hillary Clinton, and now Samantha Power’s on Twitter. (Madeleine Albright, you’re next.) Samantha Power, the former national-security adviser and recently appointed U.S. ambassador to the United Nations, officially joined the social network Monday. Her first tweet: “Honored to sit behind a sign that says ‘United States’ and stand up for American values at the UN.” She followed up with a promise to “aggressively push” President Obama’s U.N. agenda, and then she tweeted a photo of Vice President Joe Biden swearing her in.