WEST POINT, New York - The days of giving a blank check to Afghanistan are over, U.S. President Barack Obama said on Tuesday night while outlining his strategy for Afghanistan and Pakistan. The United States will work with its allies, the United Nations and the Afghan people to pursue a more effective civilian strategy and ensure the government can take advantage of improved security, Obama said during a speech at the U.S. Military Academy in West Point, N.Y. This effort must be based on performance. The days of providing a blank check are over. President Karzais inauguration speech sent the right message about moving in a new direction. Going forward, strings will be attached to U.S. assistance, Obama said. We will support Afghan ministries, governors and local leaders that combat corruption and deliver for the people, Obama said in the 33-minute speech. We expect those who are ineffective or corrupt to be held accountable. Development efforts also will be focused on agriculture because, given the countrys agri-economy, it will have an immediate impact on the lives of the Afghan people. Noting that the Afghan people have endured violence and occupation for decades, Obama said the United States has no interest in occupying your country. We will support efforts by the Afghan government to open the door to those Taliban who abandon violence and respect the human rights of their fellow citizens, Obama said. And we will seek a partnership with Afghanistan grounded in mutual respect to isolate those who destroy; to strengthen those who build; to hasten the day when our troops will leave; and to forge a lasting friendship in which America is your partner, and never your patron. Obama spent about hour on a video teleconference Monday with Afghan President Karzai, discussing the U.S. strategy in Afghanistan, the White House said. Obama also stressed that U.S. and international military intervention in Afghanistan was not open-ended and must be evaluated towards measurable and achievable goals within the next 18 to 24 months, a readout of the conference said.