Posted: Sep 04, 2015 05:54 AM MDT
Updated: Sep 06, 2016 05:44 AM MDT
The Thunderbirds and the Blue Angels flew side-by-side in Pensacola, Fla. on April 26, 2017.
With April 24-30 marking World Immunization Week, find out which U.S. states have the lowest vaccination rates.
English settlers make their first landing in North America, John Wilkes Booth is shot and killed, an explosion rocks the Chernobyl Nuclear Power Plant, and Lucille Ball dies, all on this day.