A party supporter of the main opposition party, the United National Party (UNP), waits in heavy rain for the start of the UNP's final rally before parliamentary elections in Colombo April 5, 2010. Sri Lanka's opposition on Monday vowed to deny the ruling coalition a two-thirds majority at this week's parliamentary election, saying it would give an already powerful president too free a hand to rule.Sri Lankan voters will elect a parliament on April 8 for the first time since the government defeated the Tamil Tiger separatists last year. REUTERS/Andrew Caballero-Reynolds (SRI LANKA - Tags: POLITICS ELECTIONS)