On June 30, 2013, Pat Yough and I photographed Norfolk Southern X999, an extra-dimensional (oversized load) move carrying an Air Products industrial heat exchanger.
We photographed this twice. Once on the former Reading Company line at Yardley, Pennsylvania. And again on the former Pennsylvania Railroad Trenton Cutoff near Morrisville.
This unusual train had locomotives at the front and back (to aid in changing direction) and an Air Products caboose.