The US has sought a concrete action from Pakistan in the war against terrorism. US official said, adding that it is in best interest of both the countries to carry the relationship forward. State Department spokesman Mark Toner told reporters that Washington is going to continue the war against terror with Pakistan also because it is in the interest of Pakistan which faced an existential threat.Responding to questions, Toner said the US Government understands the concerns raised in Congress about Pakistan in the wake of the bin Laden raid, and it shares some of those concerns.