Not a diss on the OP but a basic search provided no proof (from the Federal GOV anyway) that ALL Federal buildings have "blast resistant" glass. In fact, the document I link to states just the opposite, that all Federal buildings aren't created equal. Some have higher security than others. I couldn't find a single Federal document that said all buildings must have blast resistant glass.
Well that was easy... https://sgp.fas.org/crs/homesec/R43570.pdf
Not a diss on the OP but a basic search provided no proof (from the Federal GOV anyway) that ALL Federal buildings have "blast resistant" glass. In fact, the document I link to states just the opposite, that all Federal buildings aren't created equal. Some have higher security than others. I couldn't find a single Federal document that said all buildings must have blast resistant glass.