but operate completely independently. jim sciutto breaks down the differences. >> reporter: they focus on attacking international security forces there including u.s. forces and driving them out of the country. the pakistani taliban focused on attacking the pakistani government. brings it down and establishing sharia law in the country. to that end they've been responsible for some of the most horrific terror attacks in pakistan, an thatting on a market in it 009 that killed more than 100 people and an attack on a protestant church and the assassination of the former prime minister benazir bhutto and shooting of the recent nobel prize winner, malala yousafzai. the pakistani taliban has attacked americans and american interests. in 2009 a suicide bombing that killed seven cia officers in eastern afghanistan. in 2010 the failed bombing inside times square in new york city traced back to the pakistani taliban. and following the killing of osama bin laden by u.s. forces in pakistan, the...