PETA (People for the Ethical Treatment of Animals) models dressed as chickens hand out egg-free vegan cupcakes near the White House in Washington August 25, 2010. U.S. regulators on Monday were still investigating the massive salmonella outbreak that sparked a recall of more than a half billion eggs, while lawmakers launched their own probes and consumer advocates urged passage of a law to give food regulators more power. REUTERS/Kevin Lamarque (UNITED STATES - Tags: BUSINESS POLITICS FOOD)