Ballard North Hall at Gallaudet was evacuated while a bomb squad was called in, and Judiciary Square Station was closed, with trains continuing to travel through it but no stops.
Update: Judiciary Square Station is back open again after the package was deemed safe. Meanwhile at Gallaudet, the word from WJLA News is
“suspicious substance” plant fertilizer.
I saw this pinned to the corkboard while getting lunch at Five Guys in Georgetown. If you don’t get it, you don’t want or need to know. Really.