http://awol.gq.nu/AWOL_Globe%20series.htm
1-year gap in Bush's Guard duty
No record of airman at drills from 1972-73
"But both accounts are contradicted by copies of Bush's military records, obtained by the Globe. In his final 18 months of military service in 1972 and 1973, Bush did not fly at all. And for much of that time, Bush was all but unaccounted for: For a full year, there is no record that he showed up for the periodic drills required of part-time guardsmen."