Commenting on Cameron"s warning to Pakistan during his trip to India, the US State Department spokesman Phillip Crowley said, "we don"t want to see the export of terror by any country."
Crowley said, "We are concerned about and have said many times that extremist elements within the borders of Pakistan, in the tribal areas between Pakistan and Afghanistan, first and foremost, it represents a threat to Pakistan, it also represents a threat to Afghanistan."
"The Pakistani people are suffering as much if not more than any other people in the world from terrorism," he said.
"The US and Pakistan, are both satisfied with the aggressive steps that Pakistan has taken in recent months," he said.
"In the US view, Pakistan has made a strategic shift in the last year or more," Crowley said.
"Our joint concern here is to eliminate the safe havens that exist in the region and to prevent the emergence of new safe havens from which there can be the export of terrorism that can threaten the United States, Europe, or other parts of the world," he later added.