Barnard keeps photos of the broken welds on the collapsed tower — they are a reminder to him that he thinks the collapse of the tower was not the fault of the workers or the company he worked for, National Steel Erectors out of Oklahoma.
Saltire (Wikipedia)A saltire, also called Saint Andrew’s Cross or the crux decussata, is a heraldic symbol in the form of a diagonal cross. The word comes from the Middle French sautoir, Medieval Latin saltatoria (“stirrup”).