Fifty years ago, on March 23, 1965, space welcomed a sandwich -- a corned beef sandwich, snuck aboard the Gemini 3 probe.

The sandwich was smuggled into space by NASA pilot John Young. Commander pilot Gus Grissom accompanied Young on the mission -- the first manned Gemini mission and second manned U.S. space mission ever.

As Space.com reports, when Young pulled the sandwich from his pocket, Grissom asked: "Where did that come from?"

"I brought it with me," Young told him bluntly. "Let's see how it tastes. Smells, doesn't it?"

Wally Schirra, a backup crew member and one of the first men in space as part of the Mercury missions, had bought the sandwich two days earlier. Schirra, known for pranks, handed Young the sandwich on the morning of the Gemini 3 launch.

The sandwich was reportedly difficult to eat, as crumbs began floating around the cabin after the initial bite. The taste test lasted only 15 seconds, but word of the experiment spread and eventually caught the ire of Congress members -- some of who complained that by ignoring the actual space food, Grissom and Young has wasted millions of taxpayer dollars.

Despite the complaints, the Gemini missions continued, paving the way for NASA's eventual trip to the moon. Among the feats achieved by the 10 Gemini flights were: first use of orbital thrusters, first docking of two two spacecrafts and the first spacewalk.

The Gemini 3 flight also made Grissom the first man to fly in space twice. Still, Grissom later recalled the aborted sandwich as a much cherished moment.

"After the flight, our superiors at NASA let us know in no uncertain terms that non-man-rated corned beef sandwiches were out for future space missions," Grissom later remembered. "But John's deadpan offer of this strictly non-regulation goody remains one of the highlights of our flight for me."

After Gemini 3, astronauts Edward H. White II and Roger B. Chaffee replaced Young and Grissom. White, Chaffee and Grissom would perish two years later after the Apollo 1 capsule caught fire during a pre-launch test.

Young would go on to enjoy a long and celebrated career with NASA. In 1969, the onetime sandwich smuggler became the first man to orbit the Moon alone as part of the Apollo 10 mission. He later became one of only three people to twice visit the Moon.