The state and Blue Cross Blue Shield of Minnesota today began trying to prove tobacco companies violated anti-trust laws by conspiring to suppress smoking and health research. Minnesota Public Radio's Laura McCallum reports... Anti-trust expert Adam Jaffe testified the tobacco industry's confidential documents show the companies engaged in a 40-year conspiracy to suppress research linking smoking with disease. Jaffe, a Brandeis University economics professor, said the conspiracy began in the mid-50s, when companies knew they had to try to stop public panic in the face of increasing s