...the photograph I never shot...

that september 1991 i was on my way driving on interstate 15 from california to las vegas. a vision on my right side, a long train running appearing so small lost in a lower level of mojave desert immensity, going opposite the sense of my direction, i wished to find a place to stop immediately and shoot the picture....cars running in front...cars running back....no place to stop...lost the train...missed the photograph.