Following Amelia Earhart and navigator Fred Noonan's disappearance on July 2 near Howland Island during their round-the-world flight attempt, the U.S. Navy and Coast Guard mobilized ships and aircraft on July 3 in one of the largest air-and-sea searches yet conducted, covering some 250,000 square miles of open Pacific Ocean without finding any confirmed wreckage.
Earhart and Noonan had taken off from Lae, New Guinea, aiming for the speck of Howland Island nearly 2,600 miles away, guided only by dead reckoning and radio bearings from the Coast Guard cutter Itasca. Her final transmissions, received in fragments through static, grew increasingly anxious about fuel and visibility before radio contact ceased entirely.
By July 3rd, the Itasca had already begun searching nearby waters, and the Navy ordered the battleship USS Colorado and its embarked aircraft to join in, soon followed by the carrier USS Lexington and its escort of destroyers. Over the following days the search would balloon into a $4 million operation, immense for the era, scouring reefs, atolls, and open water across a swath of ocean larger than Texas.
No confirmed wreckage, body, or definitive trace was ever recovered, and the Navy officially called off the search on July 18th. The mystery of Earhart's fate has generated theories ranging from a crash-and-sink near Howland to a survival landing on nearby Nikumaroro atoll, but the events set in motion on this day produced no answers, only one of aviation history's most enduring puzzles.