i disagree. i say it s a simple one, nuclear is our greatest threat worldwide. not even a question. not even close. so i d like to denuke the world. i would like russia and the united states and china and pakistan and many other countries that have nuclear weapons get rid of them. president trump saying that his real wish is to get rid of nuclear weapons. even after threatening to launch a first strike against north korea. how do you explain these conflicting impulses? joining me now is elizabeth randall, the former deputy secretary of energy at the obama white house. i guess you were surprised to learn that after you left office in january, in the next six months, president trump managed to modernize the entire trillion dollar modernization of the arsenal. president obama set in place a agenda that included reducing