A version of this story appeared in CNN’s What Matters newsletter. To get it in your inbox, sign up for free here . CNN  —  The most important part of the Signal snafu remains the fact that the secretary of defense posted sensitive information about a forthcoming strike in a Signal chat organized by the national security adviser that inadvertently included The Atlantic’s Jeffrey Goldberg. The hunt for accountability, to the extent it occurs, will rightly focus on the security breach and whether