They said the same thing when the Alaska Pipeline was built.
Here’s the thing... ANY energy infrastructure or transport system is vulnerable to terrorist attack.
Deliver it by freight train? Don’t make me laugh... even without a terrorist attack an accident has the potential of destroying a small town ( see what happened in Canada ). See here:
Ship it? If they can blow up the USS Cole, you think they can’t blow up a ship transporting crude oil?
Therefore, this argument by Steyer is INVALID. The response as in any other method of transporting energy is the same — BE VIGILANT.