Trolley photo of the day (trivial case)
Since we're going to be spending the rest of the day in airplanes and airports, it's not very likely that we'll see any (resolvable) trolleys while we're doing it (and we're going through Houston, but, alas, the Houston airport != where the trolley line is.) So the trolley picture of the day is the only trolley picture I managed to get as we zipped towards PDX.