Armstrong fires back again at Landis

In this Nov. 7, 2009 file photo, Floyd Landis of the United States is seen after stage 8 of the PowerNet Cycle Tour of Southland, Lumsden, New Zealand. (AP Photo/NZPA, Dianne Manson)

May 21, 2010 7:15:35 PM PDT
Floyd Landis ignored desperate pleas from his sponsor to avoid a public fight with Lance Armstrong, according to e-mails the seven-time Tour de France champion released in trying to prove the disgraced cyclist has "zero credibility."