TDS ANS OPS - Williams is subject

STS090-350-002 (17 April - 3 May 1998) --- Astronaut Dafydd R. (Dave) Williams, mission specialist representing the Canadian Space Agency (CSA), is pictured during a Neurolab pulmonary function test. Williams joined four NASA astronauts and two payload specialists for 16-days aboard the Space Shuttle Columbia in support of the Neurolab mission.