Supporters of Malaysia's opposition leader Anwar Ibrahim collect buttons depicting his picture during an election campaign rally in Petaling Jaya outside Kuala Lumpur May 1, 2013. Malaysia will hold general elections on May 5 in what could be the toughest test of the ruling coalition's 56-year grip on power in Southeast Asia's third-largest economy. REUTERS/Bazuki Muhammad (MALAYSIA - Tags: POLITICS ELECTIONS)