The rift in U.S.-Pakistani relations looks set to widen after Washington failed to assure the once close ally, that it would end drone attacks on Pakistani territory. Islamabad's demands fell on deaf ears though, during the visit of the US special envoy, who's in Pakistan amid efforts to mend fractured ties. Relations between the two derailed following the U.S. raid that killed Osama bin Laden, and a NATO airstrike that left 24 Pakistani soldiers dead. To discuss this, RT talks to Robert Farley, who's an assistant professor at the University of Kentucky.