TAMUNING, GUAM - AUGUST 15:  Tourists board a shuttle bus on Pale San Vitores Road on August 15, 2017 in Tamuning, 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)