sentences:  Expedition 16 was the first ISS mission to include two crew members who had served on a previous expedition, and the first time a former commander (Malenchenko) returned as a flight engineer.Whitson was the first female commander of an ISS expedition, and with STS-120 commanded by female astronaut Pamela Melroy, it marked the first time that two female mission commanders were in orbit simultaneously.On her first expedition, Whitson implemented a "Friday night movie night" to help the crew wind down at the end of the week, and plans to keep the custom of adding some levity to the station going for Expedition 16.