national security issue, that we need grid resilience. i m not clear on what s less resilient about natural gas than coal. actually, they re very similar, of course, because you can run them day and night. the problem with renewables, desirable as they are in many ways, is that the wind doesn t always employblow and the sun d always shine. electricity isn t stored. it s manufactured and it s instantly at the wall plug. you have to have a way to keep it level. that s a good point. to the earlier discussion i was having at the white house where he made the same point about the wind needing to blow and the sun needing to shine, i got a lot of angry tweets about people who said that s nonsense, we now have the ability to store that energy. we don t have enough ability to