Thousands gather to celebrate Liberation Day in Shyira, Rwanda. Twenty-three years ago, a rebel army led by Paul Kagame, now the president, marched into Kigali to end a genocide against the Tutsi minority. Eyder Peralta/NPR hide caption

Fireworks explode over the National Mall during the 2015 July 4 fireworks show in Washington, D.C. For its 2016 Independence Day show, PBS used stock footage from previous shows, due to bad weather in the capital. Chip Somodevilla/Getty Images hide caption

Crowds gather to watch the Fourth of July fireworks show last year at Kailua Beach on the Hawaiian island of Oahu. Julie Thurston Photography via Getty Images hide caption

Artist John Trumbull's Declaration of Independence. It can be seen in the rotunda of the U.S. Capitol. /Library of Congress hide caption

At least 28 people were injured Thursday in Simi Valley, Calif., when many of the fireworks at a July 4th celebration ignited too close to the ground. People there caught the accident and posted videos. YouTube.com hide caption

She's open for visitors again. Reena Rose Sibayan /The Jersey Journal/Landov hide caption

Fireworks over the National Mall in Washington, D.C., on July 4, 2008. Photo taken from hear the U.S. Marine Corps War Memorial in Arlington, Va. Karen Bleier /AFP/Getty Images hide caption