Johnson Space Center has its origins in legislation shepherded to enactment in 1958 by then-U.S. Senator Lyndon Johnson. The Space Task Group (STG) was created on November 5, 1958 with Langley Research Center engineers under the direction of Robert Gilruth, to direct Project Mercury and follow-on manned space programs. The STG originally reported to the Goddard Space Flight Center organization, with a total staff of 45, including eight secretaries and "computers" (women who ran calculations on mechanical adding machines), and 37 engineers. This was expanded in 1959 by the addition of 32 Canadian engineers put out of work by the cancellation of the Avro Canada CF-105 Arrow project.[2] But by the time he left office on January 20, 1961, the first NASA administrator T. Keith Glennan realized that as the STG grew with the scope of America's space program, it would outgrow the Langley and Goddard centers and require its own location. Nineteen days earlier, he had written a memo to his yet-unnamed successor (who turned out to be James E. Webb), recommending a new site be chosen.[3] By the time President John F. Kennedy set the goal in 1961 to put a man on the Moon by the end of the decade, it became clear Gilruth would need a larger organization to lead the Apollo Program, with new test facilities and research laboratories suitable to mount an expedition to the Moon.[4]