McKenna is a former
U.S. Air Force officer and decorated
Vietnam War veteran. His early recognition as a sculptor came from his bronze portraits of Air Force generals, including Generals Henry "Hap" Arnold,"
Jimmy Doolittle, Doyle E. Larson,
Billy Mitchell,
Ira C. Eaker, and
John Dale Ryan In 1994, McKenna was commissioned to create The
Lincoln-Douglas Debate that stands in Lincoln-Douglas Square in Alton, Ill, where the last of the debates took place in 1857. McKenna's sports sculptures include seventeen portrait busts in the Pro Football Hall of Fame,
Knute Rockne at the
College Football Hall of Fame and his birthplace in
Voss Municipality,
Norway, sculptures of
Charles A. Comiskey at
U. S. Cellular Field in Chicago,
Dan Devine,
George Gipp,
Frank Leahy, Lou Holtz,
Ara Parseghian and
Moose Krause at
Notre Dame Stadium,
Elroy "Crazylegs" Hirsch for the
University of Wisconsin,
The French Connection (ice hockey) (
Rick Martin,
Gilbert Perrault, and
René Robert) at First Niagara Center in Buffalo, NY; Basketball coach Bill Sudeck at Western Reserve University; hurling star
Ollie Walsh in County Kilkenny, Ireland, two sculptures of
Tim Horton—one in Buffalo and the other in Hamilton, Ontario, and his sculpture of the late Ralph Wilson, founder and owner of the Buffalo Bills, unveiled in September 2015. McKenna also created the life size sculpture of Olympic Gold medalist in weightlifting,
Paul Anderson. The sculpture stands in the Paul Anderson Memorial Park in Toccoa, Georgia. ==Awards and honors==