KABUL - People in Afghanistan were surprisingly optimistic on Tuesday about NATO's plan to pull combat troops out of their war-ravaged nation by the end of 2014, but warned Western leaders to stick to aid and security promises. A Chicago summit meeting of the 28-member bloc, attended also by Afghan President Hamid Karzai and other world leaders, endorsed an exit strategy on Monday that calls for handing control of Afghanistan to its own security forces by the middle of next year. But it left unanswered questions about how to prevent a slide into chaos and a Taliban resurgence after the pullout. Despite the sense of combat fatigue in Chicago and frustration that nearly 11 years of military engagement had failed to defeat Taliban Islamists, Afghans were surprisingly upbeat. They said the agreement showed Western nations would not abandon their nation after a decade-long war and a massive aid and reconstruction effort. "I don't think foreign nations will leave us as easily as they say. The international community has spent billions of dollars here now," said university student Tawab, speaking to Reuters at a park near a mosque in central Kabul. "The conference has decided that some foreign forces will stay in Afghanistan, so it's like back-up support." Housing prices in Kabul have jumped 15 percent since U.S. President Barack Obama, who declared on Monday that the 10-year war was "effectively over", visited Kabul to sign a long-term security deal with Karzai on May 2. Donor nations have been negotiating agreements with Karzai's government committing to ongoing aid and reconstruction support, as well as government and agricultural advisers, for at least a decade beyond the two-year NATO drawdown ending in 2014. Since a US-led coalition helped Afghan forces topple the Taliban government in late 2001, Afghanistan has been one of the world's largest aid recipients, with more than US$57 billion spent on development to help counter support for insurgents. In volatile southern Helmand province, one of the most violent parts of the country and the scene of several major clashes between the Taliban and Western troops, villagers said their lives had improved.