It is in wide use by Holocaust survivors, politicians, writers, and other commentators, who invoke it for a variety of purposes.[1][2] In 2012, Elie Wiesel wrote: "'Never again' becomes more than a slogan: It's a prayer, a promise, a vow ... never again the glorification of base, ugly, dark violence." The United States Holocaust Memorial Museum made the phrase, in its universal sense, the theme of its 2013 Days of Remembrance, urging people to look out for the "warning signs" of genocide.[3]