Nuclear-armed Pakistan, a staunch US Cold War ally and key player in the US -backed invasion of Afghanistan after the Sept. 11, 2001 attacks on the United States, has watched warily as Washington has in recent years pivoted towards its arch-foe.
Islamabad views its much-bigger neighbour as an existential threat and the two nations have fought three wars since their violent separation at the end of colonial rule in 1947.
Tillerson, due to meet Prime Minister Shahid Khaqan Abbasi and Pakistan’s powerful military chiefs in a one-day visit, is expected to urge Pakistan to do more to root out Afghan Taliban and