Skyline of San Diego, Calfornia. Original image from Carol M. Highsmith’s America. Digitally enhanced by rawpixel. Free Image from public domain license 
Skyline of San Diego, California. Original image from Carol M. Highsmith’s America, Library of Congress collection.… Free Image from public domain license 
The USS Anchorage is being prepared for the Orion Underway Recovery Test 2. Original from NASA. Digitally enhanced by… Free Image from public domain license 
On the top deck of the USS San Diego, U.S. Navy personnel monitor a helicopter landing after an Orion underway recovery test.… Free Image from public domain license 
U.S. Department of Agriculture (USDA) Secretary Sonny Perdue, who is also a veterinarian, visits the world-famous San Diego… Free Image from public domain license 
U.S. Department of Agriculture (USDA) Secretary Sonny Perdue visits Rancho Guejito Avocado Farm, near San Diego, in… Free Image from public domain license 
Panda from the San Diego Zoo, a zoo in Balboa Park, San Diego. Original image from Carol M. Highsmith’s America… Free Image from public domain license 
On the top deck of the USS San Diego, U.S. Navy personnel monitor a helicopter landing. Original from NASA. Digitally… Free Image from public domain license 
SAN DIEGO, Calif. – A member of the Helicopter Sea Combat Squadron 8 signals to the pilot in an H60-S Seahawk… Free Image from public domain license 
Skyline of San Diego, Calfornia. Original image from Carol M. Highsmith’s America. Digitally enhanced by rawpixel. Free Image from public domain license 
NASA's Orion spacecraft floats in the Pacific Ocean after splashdown from its first flight test in Earth orbit. Original from… Free Image from public domain license 
At the U.S. Naval Base San Diego in California, a tug boat accompanies the USS San Diego as it departs for open seas in the… Free Image from public domain license 
Cabrillo Statue, San Diego, California. Original image from Carol M. Highsmith’s America. Digitally enhanced by… Free Image from public domain license 
U.S. Department of Agriculture (USDA) Secretary Sonny Perdue visits Rancho Guejito Avocado Farm, near San Diego, in… Free Image from public domain license