Ruby Lortie (center, wearing black), marches to get out the vote with other fifth-grade students from Boulder Community School of Integrated Studies in Boulder, Colo.
Nathaniel Minor/Colorado Public Radio
A century ago, many new immigrants to the United States ended up returning home. And it often took a while for those who stayed to learn English and integrate into American society.
Chad Riley/Getty Images
President Obama speaks during the dedication ceremony for the Smithsonian National Museum of African American History and Culture on the National Mall in Washington.
Pablo Martinez Monsivais/AP
This version of Baked Alaska at Delmonico's restaurant in New York City stays true to the original: a walnut sponge cake layered with apricot compote and banana gelato, covered with torched meringue.
Courtesy of Delmonico's Restaurant
John Wilkes Booth was the son of prominent, wealthy actors. He, too, became an actor and was so popular, he was one of the first to have his clothes ripped off by fans.
Spider Martin's most well-known photograph, Two Minute Warning, shows marchers facing a line of state troopers in Selma moments before police beat the protestors on March 7, 1965. The day became known as Bloody Sunday.
Spider Martin/Courtesy Tracy Martin
Great Dismal Swamp, in Virginia and North Carolina, was once thought to be haunted. For generations of escaped slaves, says archaeologist Dan Sayers, the swamp was a haven.
U.S. Fish and Wildlife Service
1st Lt. Alonzo Cushing, shown in an undated photo provided by the Wisconsin Historical Society, is expected to get the nation's highest military decoration -- the Medal of Honor -- this summer, nearly 150 years after he died at the Battle of Gettysburg.
Wisconsin Historical Society/AP