Officer Rank: Police Officer
Memorial Panel: 15-W: 23
Department: Port Authority of New York/New Jersey, P.D.
End of Watch: September 11, 2001
Years of Service: 23
Description: Officer Callahan was among the more than seventy police officers from a total of seven federal, state, and local agencies who were killed when terrorists crashed two of four hijacked planes into the World Trade Center towers in New York City on the morning of September 11, 2001.