(XSTL 101) STELLARTON, N.S., Mar. 27--DISASTER INEVITABLE--Arden Thompson, a geologist employed at the ill-fated Westray coal mine, takes a break during the inquiry into the May 1992 disaster in Stellarton, N.S. on Wednesday. Thompson said he knew a disaster was inevitable due to poor conditions at the mine. (CP PHOTO) l996 (stf/Andrew Vaughan) av