3M reported record second-quarter earnings of $1.66 per share, an increase of 3.8% versus the second quarter of 2011. Operating income was $1.7 billion and operating income margins for the quarter were 22.9%. All of the company’s six business segments posted operating income margins greater than 20%. Sales were $7.5 billion, down 1.9% year-over-year. Organic local-currency sales grew 1.9% and acquisitions added 0.5 percent to sales. The company noted that the combination of challenging econom...