A man was arrested after he entered the U.S. Capitol with a concealed gun during heightened security on President Donald Trump's first full day in office. The 27-year-old from Massachusetts was found with a 9 mm handgun in his waistband during a tour of the Capitol. Police stated that there was no indication he intended to harm Congress. The man was arrested after officers spotted him leaving the Library of Congress following the tour. The incident led to the suspension of an officer and an administrative investigation into the security breach.