The final flight of project Gemini succeeding in achieving its last remaining goal: to demonstrate that an astronaut could easily and effectively work outside a spacecraft. Over a two hour spacewalk, Buzz Aldrin proved that the addition of handrails outside the spacecraft and training for the spacewalk underwater made spacewalking easy and efficient. Underwater training is still used today by NASA and Russia for spacewalks. For a time, it appeared Gemini 12 might overlap with the Apollo 1 crew mission. Plans were created for such a dual-program flight. Delays to Apollo 1 ultimately forced NASA to abandon this plan. Splashing down at 19:21 UTC on November 15th, 1966, Gemini 12 brought the program to an end. NASA believed it was ready for the Moon. Two months later, the three member crew of Apollo 1 were killed in a spacecraft fire during a launch pad training exercise. NASA, in fact, was not ready.