One CBS memo cites pressure allegedly being put on Killian by "Staudt," a reference to Col. Walter B. "Buck" Staudt, one of Bush's early commanders. But the memo is dated Aug. 18, 1973, nearly a year and a half after Staudt retired from the Guard. Questioned about the discrepancy over the weekend, CBS officials said that Staudt was a "mythic figure" in the Guard who exercised influence from behind the scenes even after his retirement.
Stylistic differences. To outsiders, how an officer wrote his name and rank or referred to his military unit may seem arcane and unimportant. Within the military, however, such details are regulated by rules and tradition, and can be of great significance. The CBS memos contain several stylistic examples at odds with standard Guard procedures, as reflected in authenticated documents.
Compare: Memo obtained from Pentagon differs from disputed memo obtained by CBS.
Transcript: Washington Post staff writer Michael Dobbs, who has been following the story about Bush's Vietnam-era service, was online Monday.
In memos previously released by the Pentagon or the White House, Killian signed his rank "Lt Col" or "Lt Colonel, TexANG," in a single line after his name without periods. In the CBS memos, the "Lt Colonel" is on the next line, sometimes with a period but without the customary reference to TexANG, for Texas Air National Guard.
An ex-Guard commander, retired Col. Bobby W. Hodges, whom CBS originally cited as a key source in authenticating its documents, pointed to discrepancies in military abbreviations as evidence that the CBS memos are forgeries. The Guard, he said, never used the abbreviation "grp" for "group" or "OETR" for an officer evaluation review, as in the CBS documents. The correct terminology, he said, is "gp" and "OER."
In its broadcast last night, CBS News produced a new expert, Bill Glennon, an information technology consultant. He said that IBM electric typewriters in use in 1972 could produce superscripts and proportional spacing similar to those used in the disputed documents.
Any argument to the contrary is "an out-and-out lie," Glennon said in a telephone interview. But Glennon said he is not a document expert, could not vouch for the memos' authenticity and only examined them online because CBS did not give him copies when asked to visit the network's offices.
Thomas Phinney, program manager for fonts for the Adobe company in Seattle, which helped to develop the modern Times New Roman font, disputed Glennon's statement to CBS. He said "fairly extensive testing" had convinced him that the fonts and formatting used in the CBS documents could not have been produced by the most sophisticated IBM typewriters in use in 1972, including the Selectric and the Executive. He said the two systems used fonts of different widths.
On last night's "CBS Evening News," Rather said "60 Minutes" had done a "content analysis" of the memos and found, for example, that the date that Bush was suspended from flying -- Aug. 1, 1972 -- matched information in the documents. He also noted that USA Today had separately obtained another memo from 1972 in which Killian asked to be updated on Bush's flight certification status.
CBS executives have pointed to Matley as their lead expert on whether the memos are genuine, and included him in a "CBS Evening News" defense of the story Friday. Matley said he spent five to eight hours examining the memos. "I knew I could not prove them authentic just from my expertise," he said. "I can't say either way from my expertise, the narrow, narrow little field of my expertise."
In looking at the photocopies, he said, "I really felt we could not definitively say which font this is." But, he said, "I didn't see anything that would definitively tell me these are not authentic."
Asked about Matley's comments, CBS spokeswoman Sandy Genelius said: "In the end, the gist is that it's inconclusive. People are coming down on both sides, which is to be expected when you're dealing with copies of documents."
Questions about the CBS documents have grown to the point that they overshadow the allegations of favorable treatment toward Bush.
Prominent conservatives such as Rush Limbaugh are insisting the documents are forged. New York Times columnist William Safire said yesterday that CBS should agree to an independent investigation. Brent Bozell, president of the Media Research Center, called on the network to apologize, saying: "The CBS story is a hoax and a fraud, and a cheap and sloppy one at that. It boggles the mind that Dan Rather and CBS continue to defend it."
Staff reporters James V. Grimaldi and Mike Allen and researcher Alice Crites contributed to this report.