(Arlington)- Arlington National Cemetery loosens is visitation restrictions as part of the emergence from the COVID-19 crisis. Cemetery officials say unvaccinated visitors have to keep wearing masks when on the premises. The vaccinated can be outdoors without a mask. All visitors, vaccinated or otherwise, must wear a mask indoors. Today several of the cemetery’s features reopen including the Tomb of the Unknown Soldier, the bookstore and the MetroRail station.