Look closely at this image, stripped of its caption, and join the moderated conversation about what you and other students see. By The Learning Network Shivani Gonzalez, a TV reporter, joins us in ...

On Feb. 2, 1967, the U.S. Air Force launched a top-secret surveillance satellite called Keyhole 7-36 (KH-7). When you purchase through links on our site, we may earn an affiliate commission. Here’s ...