STATION TOUR HARMONY TRANQUILITY : ....

Expedition 33 Commander Suni Williams starts off her tour of the International Space Station with a look at its nodes -- Harmony, Tranquility and Unity -- which include the crew's sleeping quarters and hygiene station.

Destiny, Columbus, Kibo:

• Station Tour: Destiny, Columbus, Kibo

Cupola and Leonardo:

• Station Tour: Cupola and Leonardo

Zarya and Zvezda:

• Station Tour: Zarya and Zvezda