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This photo dates to the early 1920s. The caption reads: The Last Word in Fighting Airplanes. This
UMG25A05_439

This photo dates to the early 1920s. The caption r...

United States of America, New Hampshire. Mount Washington Observatory. An observer measuring the
UMG25A00_020

United States of America, New Hampshire. Mount Was...

This 1902 illustration shows the spectre of the Brocken. A Brocken spectre, also called Brocken
UMG25A01_097

This 1902 illustration shows the spectre of the Br...

Karol Orlos (1894 - 1931) captain, pilot and observer of the Polish Army (ca. before 1931)
UMG22A39_275

Karol Orlos (1894 - 1931) captain, pilot and obser...

Berlin Wall Photo
UMG22A07_013

Berlin Wall Photo

Long Range Reconnaissance Patrol Mission
UMG22A00_117

Long Range Reconnaissance Patrol Mission

Second Lt. Erwin Russell Bleckley, Medal of Honor
UMG22A00_453

Second Lt. Erwin Russell Bleckley, Medal of Honor

Oval World Map
UMG21A17_223

Oval World Map

Readers! The U.S. Air Force Needs Your Help!
UMG20B31_133

Readers! The U.S. Air Force Needs Your Help!

Magic Lantern slide circa 1900 hand coloured
UMG20B22_361

Magic Lantern slide circa 1900 hand coloured

Germany - Belgium, 1914-18.
UMG20B15_371

Germany - Belgium, 1914-18.

U.S. Army observer in Basket
UMG20A72_410

U.S. Army observer in Basket

U.S. Army observer in Basket
UMG20A72_411

U.S. Army observer in Basket

Military Observer hangs from a Balloon by guide wires looking over battlefield
UMG20A67_243

Military Observer hangs from a Balloon by guide wi...

Train Carries a man 10 stories aloft on what looks like a Chimney
UMG20A57_124

Train Carries a man 10 stories aloft on what looks...

Tree-Climbing Observer Gets on His Camouflage
UMG20A74_348

Tree-Climbing Observer Gets on His Camouflage

Attack on the Printing Office of the Alton Observer, 1837 from "The Martyrdom of Lovejoy" by Henry
UMG12A14_314

Attack on the Printing Office of the Alton Observe...