Pres Trump is presented with a book, and then inscribes a message in the visitor's book - as the first sitting US Pres to visit the wall.

Pres Trump is presented with a book, and then inscribes a message in the visitor's book - as the first sitting US Pres to visit the wall. pic.twitter.com/fLACcygzpS

— Mark Knoller (@markknoller) May 22, 2017