As SDM celebrates its 40th anniversary this year, marked by the January 1971 inaugural issue, we invite you to step back in time by browsing through the next few pages on which we present a sampling of some of the articles and photos published between 2000 and 2010. We also invite you to visit our 40th anniversary presenta- tion online at www.sdmmag.com, where you can vote for your favorite cover or add to our message board.