What might Baghdad and Manhattan look like after a nuclear assault? The relevance of such a question lends a more than chilling aspect to this little book, which pieces together the “before” and “after” of a story whose moral we seem to have forgotten. Before: snapshots taken of Hiroshima after the atom bomb leveled the city in 1945. After: a set of extraordinary photographs by Harold Edgerton, hired in the 1950s by the U.S. government to document its nuclear tests. Essays by Hilton Als and James Elkins.