After Hours

NASA Images: More desktop wallpaper from the space program

GT-4 Launch 1965

Gemini-Titan 4 (GT-4) lift-off from Pad 19. This flight included the first spacewalk by an American astronaut.

Credit: NASA


Mark W. Kaelin has been writing and editing stories about the IT industry, gadgets, finance, accounting, and tech-life for more than 25 years. Most recently, he has been a regular contributor to,, and TechRepublic.