 If implemented, the Orion/Ares I stack would resemble the towerless Gemini-Titan stack used between 1965– 66 , in which ejection seats were used as the primary form of escape for the astronauts who flew on the ten Gemini missions.
<fluency>  If implemented, the Orion/Ares I stack would resemble the towerless Gemini-Titan stack used between 1965– 66 , in which ejection seats were used as the primary form of escape for the astronauts who flew on the ten Gemini missions.
 If implemented, the Orion/Ares I stack would resemble the towerless Gemini-Titan stack used between 1965– 1966 , in which ejection seats were used as the primary form of escape for the astronauts who flew on the ten Gemini missions.