Astronaut Robert Behnken, STS-130 mission specialist, works with a Fluid Processing Apparatus, which is part of the Microbe Group Activation Pack, on the middeck of space shuttle Endeavour in this photo released by NASA and taken February 9, 2010. REUTERS/NASA Handout (UNITED STATES - Tags: SCI TECH) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS