Chaos erupted inside the U.S. Capitol as of pro-Trump demonstrators charged the building and eventually made their way past multiple layers of barriers and inside. Both the House and Senate recessed in response to the breach, and Vice President Mike Pence, who was in the Senate, was whisked away. Lawmakers and staff were ordered to seek shelter and remain away from doors and windows. The U.S. Capitol Police sent out an alert shortly after 2 p.m. warning of an "internal security threat." The alert urged people to move inside their offices, lock doors, seek cover and remain silent. The incredible scene unfolded as lawmakers gathered in a joint session to count the Electoral College votes and confirm President-elect Joe Biden's victory in November's election. Soon after the joint session began, GOP lawmakers objected to results from Arizona, a move that prompted each chamber to begin debating the objection separately. #Capitol #Protests #ElectoralCollegeVote CBSN is CBS News’ 24/7 digital streaming news service featuring live, anchored coverage available for free across all platforms. Launched in November 2014, the service is a premier destination for breaking news and original storytelling from the deep bench of CBS News correspondents and reporters. CBSN features the top stories of the day as well as deep dives into key issues facing the nation and the world. CBSN has also expanded to launch local news streaming services in major markets across the country. CBSN is currently available on CBSNews.com and the CBS News app across more than 20 platforms, as well as the CBS All Access subscription service. Subscribe to the CBS News YouTube channel: http://youtube.com/cbsnews Watch CBSN live: http://cbsn.ws/1PlLpZ7c Download the CBS News app: http://cbsn.ws/1Xb1WC8 Follow CBS News on Instagram: https://www.instagram.com/cbsnews/ Like CBS News on Facebook: http://facebook.com/cbsnews Follow CBS News on Twitter: http://twitter.com/cbsnews Subscribe to our newsletters: http://cbsn.ws/1RqHw7T Get new episodes of shows you love across devices the next day, stream CBSN and local news live, and watch full seasons of CBS fan favorites like Star Trek Discovery anytime, anywhere with CBS All Access. Try it free: http://bit.ly/1OQA29B