Raimond Spekking/Creative Commons
Russia
Raimond Spekking/Creative Commons
G. Skidmore; J-M. Ferre; UCS
Hedgerow INC/Flickr
Lily Li/Unsplash
Google Earth
Wikimedia
Google Earth
Ehimetalor Akhere Unuabona/Unsplash
Max Kukurudziak/Unsplash
Wang Ting/Physics Today
Giancarlo Casem, Air Force
Enrico Strocchi/Flickr
U.S. Air Force photo/Staff Sgt. Kamaile O. Long
Randy Montoya/Sandia National Laboratories
DARPA