Mutations: enemies of evolution

In school we are taught that 'Mutations + Natural Selection = Evolution', but do genetic mutations really help evolution? Changes in DNA are supposed to provide the new functions that natural selection 'chooses' leading to the evolution of simply organisms into more complex ones. However, leading geneticists agree that mutations lead to extinction, not evolution into something better. This episode features portions of an interview with former evolutionary geneticist Dr John Sanford.