that's when edward shah moved out of the building. he left this building and moved in some smaller space. i'm not sure where yet. he's an intriguing personality that we're researching to find out what his role was, his relationship with clara barton. >> i work for the general service administration as a carpenter. in 1996 they sent us out to the buildings that they acquired from the pennsylvania avenue development corporation to clean them up, make sure nobody was living in them. it was the day before thanksgiving. in '96. i made my way up the steps. i got in here. no lights. no nothing. i came over here and looked around. and nothing was here. so i happened to witness, you don't usually witness one. but i witnessed an accident. i'm standing here watching to see what happens. i felt like somebody staped me on the shoulder. i turned around and wasn't nobody there. when i turned back around, i turned around like this, and the corner of my eye i seen an envelope hanging between the ceiling and the wall. it was all levelled off and everyt