LEMON: Angelina Jolie reemerged in public today. We saw her for the first time since she had that double mastectomy. She's in London with fiance, Brad Pitt, for his movie premiere. And as you might expect, it turned into something of a media sensation. Our Erin McLaughlin has more now from London.</s>ERIN MCLAUGHLIN, CNN CORRESPONDENT: Every eye, every camera was trained on Hollywood's golden couple tonight as they arrived together for the premiere of Brad Pitt's film, "World War Z". Angelina Jolie looked absolutely stunning; she was wearing a floor-length backless black gown. She took time to sign fans' autographs and also take pictures. This was, after all, her first public appearance since she announced her decision to undergo a double mastectomy, a decision she took as a preventative measure after testing positive for the BRCA1 gene which makes her more susceptible to both breast and ovarian cancer. She talked about her ordeal before going into the premiere.</s>ANGELLINA JOLIE, ACTRESS: I've been happy to see the discussion about women's health expanded and that means the world to me. After losing my mom to these issues, I'm very grateful for it and I have been moved by the kind support from people -- really very grateful for it.</s>MCLAUGHLIN: This is also a big night for Brad Pitt. He not only stars in "World War Z", his company also helped to produce it. So he has a lot riding on this film. He says he's thankful to have Angelina by his side. Erin McLaughlin, CNN, London.</s>LEMON: All right, Erin. Coming up, could the Boston Marathon bombings have been prevented? A group of lawmakers just back from Russia, well they say, yes. Plus, a deadly tornado in Oklahoma takes many people by surprise including experienced storm chasers. Find out why this tornado was unusual and especially dangerous.
Angelina Jolie Steps Out in London