Could this be the end for Pakistan's new president, Asif Ali Zardari? The government is banning protests and arresting hundreds for fear that a planned national protest march might eventually topple Zardari's regime. Protests led by some of the same leaders helped bring down General Pervez Musharraf in 2007. Zardari's six month-old government has been under fire over a worsening economy and growing Islamist insurgency. American intelligence officials have long warned that a destabilized Pakistan could pose a major threat to the U.S., as the country possesses nuclear weapons and houses a large number of Taliban militants and Al Qaeda terrorists.