About 30 percent of the military's more than 2.7 million spouses and family members live on bases worldwide, experts say. A recent statement from North Korea towards the U.S. territory of Guam, home to about 160,000 U.S. residents and about 13,000 troops and military families at two military installations, threatened an attack on the island. This still unfolding drama got us wondering: what's the plan for military families in the unlikely case of a serious incident or an imminent threat to their base?