times festival of books jonathan waldman. [applause] >> thanks. >> is finish -- so my opening question for you is what is a bigger threat to the united states military, isis or rust? [laughter] >> there's a guy in the pentagon who would like you to throw that question at him. he's our nation's highest-ranked rust official. [laughter] he's been fighting a very good fight for about ten years now. he's making friends on the hill with a lot of politicians and among admirals in the navy who say we can't keep going the way we're going, losing hips to rust. we -- ships to rust. we can't build them fast enough. he would say it's clearly rust. i try to stay away from proclamations like that, but i did write in the book that rust is greater than all other natural disasters combined. and people this weekend have asked me, i don't get it, a book about rust. i said think about it this way: our most abundant element is attacking our most important material all the time, everywhere. so isis is not bad. [laughter] >> and you say there's a sh