Pakistan became front line state with?

Answer 1

I think I understand your question.

Recently, many terrorists and Al Qaeda operatives have left the Tora Bora mountains in Afghanistan and entered into Pakistan. Because of the amount of American soldiers in Afghanistan, and the amount of terrorists killed there, they are fleeing in droves.

But, because the northern parts of Pakistan are pretty much lawless, they are finding refuge there. There have been recent attempts at cooperation between Pakistan and America, but many of them have failed. We are not currently at war with Pakistan, so we cannot send a large amount of troops there. But, we do have the capability to strike there with our air force. And, the Pakistani military does occasionally bring terrorists within its borders to justice.