Last week, Massey Energy and its CEO Don Blankenship repeated their contention that although 29 of their workers died in the Upper Big Branch mine explosion earlier this month, they emphasize safety and no problems were found in the mine just before the blast. Blankenship suggested that the disaster was caused by nature or man. This bogus excuse — that workers died at their own hand or God’s — is a common dodge managers use to evade responsibility. It’s a lie.