 Well, they say they don't sign up for four years to see the shipyard for four years, but a Marine signs up to see the world through the sights of an M4. Members of Congress say such upgrades are crucial. You may experience longer wait times if you go to make an appointment at the dentist. According to the Virginia Dental Association, a workforce shortage is impacting patient wait times, and there's a shortage of educators to teach them, too.