The joint military drills between Seoul and Washington came to an end on this Friday a day earlier than originally planned.But North Korea says if South Korea were sincere about improving cross border ties Seoul would have put a permanent halt to the exercises.The North branded the drills as practice for an invasion, and said South Korea needs to make up its mind on whether it wants dialogue or war.If the choice is dialogue, the North said all future joint exercises with the U.S. would need to stop.This comes after Seoul proposed holding high-level talks with the North earlier this month, which went unanswered.