Alexander Graham Bell  was born in Edinburgh, Scotland and was a renowned
scientist, inventor, and engineer who is credited with inventing the first practical
telephone. In 1888, Alexander Graham Bell became one of the founding members
of the National Geographic Society.

Bell with his prototype model of the telephone

Astronaut John Glenn became the fifth person in space and the first American to
orbit the Earth, aboard the Friendship 7 Mercury capsule (shown above). He
circled the globe three times during a flight lasting 4 hours, 55 minutes, and
23 seconds.  

Astronomer/professor Clyde W. Tombaugh (above) was the first to discover the
planet Pluto while taking  photos of the night sky from Lowell Observatory in  
Flagstaff, Arizona. The discovery made headlines across the world.

Lowell Observatory

 
Left to right above are John W. Mauchly and John P. Eckert

ENIAC short for Electronic Numerical Integrator And Computer, was the world’s
first general-purpose electronic computer. It was a digital computer capable of being reprogrammed to solve a full range of computing problems. ENIAC was designed to calculate artillery firing data for the U.S. Army’s Ballistic Research Laboratory. The computer was conceived and designed by John W. Mauchly and John P. Eckert
(photo above) of the University of Pennsylvania’s Moore School of Electrical
Engineering. The project was financed by the U.S. Army during World War ll.

 
Above are photos of the ENIAC and programmers at the University of Pennsylvania

Charles Elwood "Chuck" Yeager is a retired major general in the
United States Air Force and noted test pilot. He was the first man to
break the sound barrier on October 14, 1947, flying the experimental
Bell X-1 (shown below) at Mach 1 at an altitude of 45,000 feet.

 
USAF Command Pilot Wings