Anti-government protesters hold up a sign with a defunct Riyal banknote during a protest demanding the ouster of Yemen's President Ali Abdullah Saleh, outside Sanaa University March 3, 2011. Saleh will respond "positively" to an opposition roadmap for him to step down from power and reform politics, a senior aide said, as anti-Saleh protests continued across the country. The sign reads, "Leave!" REUTERS/Khaled Abdullah (YEMEN - Tags: POLITICS CIVIL UNREST)