The US military has 30,000+ Soldiers in South Korea. We have a troops in Okinawa, Guam and Hawaii permanently stationed there. The USAF has air defenses and anti-missile battery set up. The Army and Marines run mountain warfare training for troops to prep for mountain terrain and cold weather (ie; Afghanistan and Korea). In addition, you have Naval Fleet forward deployed in the Pacific with Sailors and Marines. In addition, you have Airborne Soldiers who can receive their orders and drop into country within a few days. Oh, we are still technically at war too. The US gov't and military knows this. We let N. Korea do their move- we do not need to be more aggressive. Just cut aid. They are just pissed because we don't send them aid.