 Comer Cites reports Dr. O'Connor has not recommended the president to take a cognitive test. The committee is looking to interview Dr. O'Connor and is requesting documents from him. He has until July 14th to respond. Perry Russom, ABC News, Washington. Four NASA volunteers emerged from 378 days cooped up inside a habitat simulating what it would be like to live on Mars, growing and harvesting food, resource limitations and isolation. Flight engineer Ross Brockwell.