 Boukreev's supporters (who include G. Weston DeWalt, Boukreev's co-author of "The Climb" (1997)) state that using bottled oxygen gives a false sense of security.Krakauer and his supporters point out that, without bottled oxygen, Boukreev was unable to directly help his clients descend, and that Boukreev said that he was going down with client Martin Adams, but later descended faster and left Adams behind.The worsening weather began causing difficulties for the descending team members.