Posted: Feb 11, 2015 10:15 PM MST
Updated: Jul 15, 2016 04:05 AM MDT
Teachers teach the students and those students teach younger students. It's the circle of learning at Pueblo City School District 60.
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.