YIGO, GUAM - AUGUST 17:  A U.S. Air Force Rockwell B-1B Lancer sits on the tarmac at Andersen Air Force base on August 17, 2017 in Yigo, Guam. The American territory of Guam remains on high alert as a showdown between the U.S. and North Korea continues. North Korea has said that it is planning to launch four missiles near Guam by the middle of August. Guam home to about 7,000 American troops and 160,000 residents.  (Photo by Justin Sullivan/Getty Images,)