The U.S. Capitol had 658 windows and all but 12 were bomb proof along with 2 doors and all
12 windows were hit by Trump's J-6th thugs along with those 2 doors.
C. Pierce, "I Don't Believe in This Kind of Luck" ... Trump's shock Troops knew the weak spots
Published Oct. 2021
"Video shows some of the first rioters to break through the police line running past 15 reinforced windows, making a beeline for a recessed area on the Senate side of the building, where two unreinforced windows and two doors with unreinforced glass were all that stood between them and hallways leading to lawmakers inside."
The majority of the Capitols 658 single-pane windows were quietly upgraded during a 2017-19 renovation of the historic building. The original wooden frames and glass were covered with a second metal frame containing bomb-resistant glass.
snip
And whether by sheer luck, real-time trial and error, or advance knowledge by rioters, several of those vulnerable windows and two glass-paned doors protected with only a thin Kevlar film added after the Sept. 11 terrorist attacks became easy entry points for hundreds of Trump supporters who overran and ransacked the building on Jan. 6.
snip
Video shows some of the first rioters to break through the police line running past 15 reinforced windows, making a beeline for a recessed area on the Senate side of the building, where two unreinforced windows and two doors with unreinforced glass were all that stood between them and hallways leading to lawmakers inside who had not begun to evacuate. A rioters fist cracked the glass of one window, video posted to social media shows. A stolen police riot shield and a wooden pole finished the job. In seconds, the unreinforced glass gave way in a single sheet. Rioters poured through the window. Similar methods were used to break glass in at least three other locations.
https://www.esquire.com/news-politics/politics/a37884804/january-6-capitol-riot-unreinforced-windows/