ST. PAUL, Minn.--(BUSINESS WIRE)--3M (NYSE: MMM) today announced the following investor events: Bernstein’s 31st Annual Strategic Decisions Conference in New York, N.Y., on Friday, May 29, 2015. Inge G. Thulin, chairman, president and chief executive officer, will speak at 11:00 a.m. EDT. Deutsche Bank Global Industrials and Basic Materials Conference in Chicago, Ill., on Thursday, June 4, 2015. Nick Gangestad, senior vice president and chief financial officer, will speak at 2:20 p.m. CDT. Seco