Funded in 1990 by the National Science Foundation, LIGO consists of two facilities, in Hanford, Washington, and Livingston, Louisiana. Last year, the Louisiana facility got off to a rocky start. Noise from lumber operations and nearby traffic proved too strong for LIGO's shock absorbers, forcing experiments to a halt. But now LIGO scientists report that these problems have been overcome. Although still in the preparatory stage, LIGO is already the most precise instrument of its kind. "Even if we detect nothing," says LIGO scientist David Shoemaker, "we'll detect nothing at a more sensitive level than it's been detected before."