Air Force Squadron
Science Source
Machine Gun Kelly Wanted Poster, 1933
Science Source
Puckle Defence Gun Patent, 1718
Science Source
Gatling Gun
Smithsonian Institution
Da Vinci Multi-barrel Gun Designs 1481
Science Source
World War II Us Army Tank
H. Armstrong Roberts/ClassicStock
Army Caterpillar With Artillery Cannon
H. Armstrong Roberts/ClassicStock
Hiram Stevens Maxim, American-anglo
Science Source
July Days Bolsheviks Clash
Photo Researchers
Hiram Maxim, American-anglo Inventor
Photo Researchers
Bubble Machine #1
Ted Kinsman
Bubble Machine
Ted Kinsman
John Ericsson, Swedish-american Inventor
Photo Researchers
John Ericsson, Swedish-american Inventor #1
Photo Researchers
John Ericsson, Swedish-american Inventor #2
Photo Researchers
John Ericsson, Swedish-american Inventor #3
Photo Researchers
Airport Security
Alexander Tsiaras