“A provision in the national health-care law that lets young adults stay on their parents’ insurance plan is popular with many families—but not ones in the military. Families covered by Tricare, the health program for active and retired members of the military, must pay as much as $200 a month to let an adult child stay on their plan until age 26. Most families in private plans now pay no fee to extend such coverage. Military families are starting to complain about the disparity, saying they can’t afford those premiums and have let their children go uninsured.”