rehearsal for Joe Biden’s inauguration scheduled for Sunday has been postponed because of security concerns, according to two people with knowledge of the decision. After last week’s riots in Washington, security officials have locked down the Capitol complex, and the National Guard is expected to deploy more than 20,000 troops to assist with security. Top lawmakers and Homeland Security officials have been alarmed about the rising threats around the inauguration, and the FBI warned this weekend of armed protests in all 50 states.