US President Barack Obama and his Afghan counterpart Hamid Karzai have held an hour-long video conference talk, in which they vowed to continue working together to combat the Taliban. In a statement, the White House said also repeated US commitment to working with Afghans on stability and security. Both leaders agreed to continue their efforts to combat violent extremism, protect the Afghan people, improve governance, and deliver basic services, particularly at the local level. US envoy to Kabul Karl Eikenberry and top military commander General David Petraeus also participated in the video conference, the White House said.