Lead can harm mental and physical development even in babies before they are born.
VOA: special.2009.06.09
It is believed that sleep deprivation may harm neurological developmentand can contribute to behavioural problems including attention deficit hyperactivity disorder (ADHD).
Regardless of the hyperbole, when the former head of the CIA, who most probably has intimate knowledge of the development of Stuxnet and the potential harm that could be caused by attacks against critical infrastructure talks about cataclysmic risks it may be well to pay attention.