A nice article about the FBI spy house in DC

https://www.atlasobscura.com/places/fbi-spy-house?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=fbbf361837-EMAIL_CAMPAIGN_2021_02_10&utm_medium=email&utm_term=0_f36db9c480-fbbf361837-64536349&mc_cid=fbbf361837&mc_eid=9337bd4ceb