"Over the course of time, culture has bred certain defenses," Logan said. "The reality is, people are using substances to reengineer their bodies or heal better. That's reality."
Track stars Tyson Gay, Asafa Powell, Sherone Simpson all fail drug tests →
He said he wasn't surprised when he heard about Sunday's onslaught of failed tests and didn't put much credence into the excuses and apologies from those who came up positive.