US President Barack Obama has dispatched two of his most senior national security aides to Pakistan in the wake of the failed Times Square car bombing, a White House official said Tuesday. US national security advisor General James Jones and CIA Director Leon Panetta have left on a mission to investigate the May 1 bomb plot, which has been blamed on the Pakistani Taliban. In light of the failed Times Square terrorist attack and other terrorist attacks that trace to the border region, we believe that it is time to redouble our efforts with our allies in Pakistan to close this safe haven and create an environment where we and the Pakistani people can lead safe and productive lives, a White House official told a foreign news agency. The US and Pakistan have a robust bilateral relationship based on shared interests. We are in frequent contact and this is one of many senior-level engagements that occur, the official added.