Capsule sinks in 1961 mission

In 1961, during the Mercury-Redstone 4 mission, astronaut Gus Grissom's capsule, the Liberty Bell 7, sank in the Atlantic Ocean after its hatch opened unexpectedly. Grissom narrowly escaped the flooding capsule, but it sank to the ocean floor, raising questions about whether he had triggered the hatch himself. The incident remained a mystery for nearly four decades.

Capsule recovered in 1999

The Liberty Bell 7 was found in May 1999 using sonar technology and recovered in July 1999, exactly thirty-eight years after the original mission. The capsule was retrieved using a remote-controlled vehicle and a Kevlar line, and it was brought back to Cape Canaveral.

Personal items found inside

Inside the capsule, items such as cigarette butts, a disposable plastic cap, Dial soap, five one-dollar bills, and 52 Mercury dime coins were found, offering insight into Grissom's personal effects from the mission. However, the mechanism's condition did not provide definitive answers about the cause of the hatch opening.

Changes in NASA's design

The incident influenced NASA's decision to replace the explosive hatch with a manual system for the Apollo program. This change, however, may have contributed to the challenges faced during the Apollo 1 fire in 1967, which resulted in the deaths of Grissom and two other astronauts.

Legacy and display of the capsule

The recovery of the Liberty Bell 7 capsule allowed for a reevaluation of Grissom's legacy, as the lack of incriminating evidence has led many to favor his account that the hatch opened on its own. The capsule is now on display, serving as a reminder of the uncertainties and technical challenges of early space exploration.