WASHINGTON - Documents that should have been written to explain gaps in President Bush (news - web sites)'s Texas Air National Guard service are missing from the military records released about his service in 1972 and 1973, according to regulations and outside experts.

For example, Air National Guard regulations at the time required commanders to write an investigative report for the Air Force when Bush missed his annual medical exam in 1972. The regulations also required commanders to confirm in writing that Bush received counseling after missing five months of drills.

No such records have been made public and the government told The Associated Press in response to a Freedom of Information Act lawsuit that it has released all records it can find.