Today marks the Semiquincentennial — 250 years since the Declaration of Independence. The centerpiece national celebration is the Salute to America on the National Mall in Washington, D.C., featuring military flyovers, performances, presidential remarks, and the largest fireworks display in American history. Salute to America Celebration & Fireworks (National Mall, Washington, D.C.) Location: Washington Monument Grounds / National Mall. Schedule highlights (all times ET): Day