Usually we call attention to events before they happen, but today we’re retro-celebrating National Train Day that somehow sped past us like a high-speed Amtrak Acela and was gone before we even knew it was coming. On May 9 the second annual Train Day celebrated “140 years of connecting travelers from coast to coast.” (Cool fact: It was on May 10, 1869, that the ceremonial Golden Spike joined the rails of the Central Pacific and Union Pacific railroads at Promontory Summit, Utah, thus completing the Transcontinental Railroad.) So, we’re celebrating a few weeks after the fact, and more than 11 months in advance of the third annual National Train Day.