Obama, Pakistan's Nawaz Sharif meet at White House --- WASHINGTON — President Obama and Pakistani Prime Minister Nawaz Sharif sought to strengthen their countries' fragile relationship with a two-hour Oval Office meeting Wednesday that touched on sensitive subjects, including U.S. drone strikes, Afghanistan's future and the security of Islamabad's growing nuclear arsenal. --- In their first face-to-face meeting, the leaders said they emphasized mutual efforts to stabilize Pakistan's economy and deal with terrorism and other security threats. --- Pakistan is also worried that an abrupt U.S. troop withdrawal in 2014 in Afghanistan could destabilize that country's government, sending waves of refugees across the border into Pakistan and potentially increasing the influence of neighboring states, such as India. - More, latimes