Cosmonaut Alexandr F. Poleshchuk (right) inventories medical supplies with Ezra D. Kucharz, medical operations trainer for Krug Life Sciences, Incorporated. Poleshchuk, a Mir reserve crew member, and a number of other cosmonauts and astronauts participating in the joint Russia - United States program were in Houston, Texas, to prepare for upcoming missions which involve crew members from the two nations.