"Myers said the events of Sept. 11, 2001, are "burned indelibly" in his mind. President Bush had nominated Myers - then the vice chairman - to replace Army Gen. Henry Shelton as the chairman. Shelton was in the air on his way to NATO meetings in Europe. Myers was discussing his confirmation process with Georgia Senator Max Cleland when the first plane hit the World Trade Center in New York. When the second plane hit and it became obvious that America was under attack, Myers rushed back to the Pentagon."
"On his way back to the building, he received word that the Pentagon had been attacked. He went into the smoke-filled building and manned the National Military Command Center with Defense Secretary Donald H. Rumsfeld."
http://www.defenselink.mil/news/Sep2005/20050928_2866.htmlThe article is dated 28 September 2005 and it's from Defense Link. The journalist appears to have spoken to him about this.
How long does it take to get from the Hill to the Pentagon and by what means of transport would he have travelled?