Overview
- An envelope was opened Thursday inside a facility at the Maryland base, prompting evacuations of that building and a connected one and the establishment of a security cordon.
- Multiple personnel were evaluated at Malcolm Grow Medical Center; officials said they were in stable condition and later released.
- Sources said the package contained an unknown white powder, and initial field testing by a HAZMAT team detected no hazardous substance before the team departed.
- The room where the envelope was opened, in a building that houses the Air National Guard Readiness Center, remains sealed.
- The Office of Special Investigations is leading the inquiry and reviewing material described as political propaganda, with the base’s role in presidential and VIP travel underscoring the incident’s sensitivity.