Does the U.S. have troops in North Korea at this time? If so, how many and where? South Korea? Where? What is the location of the nearest troops to North Korea? Strength-size?
As of May, 2009, the U.S. had 28,500 troops in South Korea:
http://www.usatoday.com/news/world/2009-05-28-north-south-korea_N.htm