https://www.vice.com/en_us/article/m7apzb/senators-tweet-revealed-where-lawmakers-were-hiding-from-trump-rioters

Social media has a way of disrupting the best laid plans. As rioters stormed the capitol building on January 6, members of Congress took shelter in various locations throughout the building. At four minute before 5, when rioters were still in and around the Capitol building, Senator Jeff Merkley (D-OR) tweeted a picture that gave away his location.

“Electoral college ballots rescued from the Senate floor,” Merkley said in his tweet that showed a picture of the ballots and the feet of several people milling on a blue carpeted floor. “If our capable floor staff hadn’t grabbed them, they would have been burned by the mob.” It’s great that quick thinking staff thought to preserve the electoral votes, but Merkley inadvertently shared their new location while the crisis was ongoing.