In 1978 , MacMahon entered a nursing home , where he lived until his death in 1980 .
After officially retiring in 1958 , MacMahon moved to Poughkeepsie , New York , but traveled frequently teaching and lecturing in Turkey , India , Uganda , and Argentina .
In 1978 , MacMahon entered a nursing home , where MacMahon lived until MacMahon 's death in 1980 .
After officially retiring in 1958 , MacMahon moved to Poughkeepsie , New York , but traveled frequently teaching and lecturing in Turkey , India , Uganda , and Argentina .