E medal awarded to the crew of the Arizona in 1924 for efficiency in navigation (as measured by the amount of fuel used in getting from port to port). The Arizona herself was decorated with a red "E" on her smokestack at this time.
"El Intruso" 1921-1969 was newspaper microfilm project that took place at the University of Arizona and the University of Sonora. Collaborators included Dr. Kieran McCarty, Dr. Fernando Tapia, et. al.