headquarters of the Naval Sea Systems Command (NAVSEA) inside the Washington Navy Yard in the Southeast quadrant of the city. The attack, which took place in the Navy Yard's Building 197, began around 8:20 a.m. EDT and ended when Alexis was killed by police around 9:20 a.m. EDT. It was the second-deadliest mass murder on a U.S. military base, behind only the Fort Hood shooting in November 2009. Statehood movement On November 8, 2016, Washington voters were asked to advise the Council to approve or reject a proposal, which included advising the council to petition Congress to admit the District as the 51st State and approve a constitution and boundaries for the new state. The voters of the District of Columbia voted overwhelmingly to advise the Council to approve the proposal, with 86% of voters voting to advise approving the proposal. Challenges, including Republican opposition in Congress and constitutional issues, continue to cause problems for the movement. January 6 United States Capitol attack In 2021, right-wing demonstrators gathered at a rally in support of President Donald Trump during his attempts to overturn the 2020 United States presidential election stormed and occupied the United States Capitol in an effort to prevent Congress from certifying the election's Electoral College results and Trump's rival Joe Biden's victory. Changing demographics New migration patterns have appeared. Washington has a steadily declining black population, due to many African Americans' leaving the city for suburbs. At the same time, the city's Caucasian and Hispanic populations have steadily increased. Since 2000 there has been a 7.3% decrease in the African-American population, and a 17.8% increase in the white population. In addition, many African Americans are going to the South in a New Great Migration, because of family ties, increased opportunities and lower cost of living. See also Historical outline of the District of Columbia List of incidents of political violence in Washington, D.C. List of rallies and protest marches in Washington, D.C. Reportedly haunted locations in Washington, D.C. Timeline of Washington, D.C. Architecture of Washington, D.C. Notes References Further reading Abbott, Carl. Political Terrain: Washington, D.C., From Tidewater Town to Global Metropolis (U of North Carolina Press, 1999). Allgor, Catherine. Parlor Politics: In Which the Ladies of Washington Help Build a City and a Government (U of Virginia Press, 2002) Borchardt, Gregory M. "Making DC Democracy's Capital: Local Activism, the 'Federal State', and the Struggle for Civil Rights