dr. anthony fauci about promising new ways to prevent aids. that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: >> lehrer: the president of afghanistan appealed for greater global support at today's kabul conference on security and development. as he spoke, the country's problems were underscored by events outside the afghan capital. zelikow president karzai addressed representatives from dozens of nations and organizations. and he called again for afghans to take charge of their own security nationwide by 2014. >> the national institutions dedicated to fulfilling the constitutional duty has ensured the security of our country. >> lehrer: karzai's date of 2014 is more than three years after american troops are supposed to start a drawdown. under president obama's timetable but at the conference secretary of state clinton insisted the u.s. has no intention of abandoning afghanistan. >> the july 2011 date captures both our sense of urgency and the strength of our resolve. the transition process is too important to push off indefinitely, but