RT [@DrEricDing](https://twitter.com/DrEricDing/status/1347019319566340101) WHOA—The US Capitol siege today started at this exact moment — when the Capitol police were completely caught off guard when rioters stormed the fence and overran them. Where was the backup? Why wasn’t the National Guard pre-stationed there? So angry. ? https://t.co/rQ2UT4BZTj