Pakistani Army soldiers guard nuclear-capable missiles at the International Defence Exhibition in Karachi in 2008. The Washington Post reports that concern over their security is a "blind spot" in U.S. intelligence efforts. Rizwan Tabassum/AFP/Getty Images hide caption

itoggle caption Rizwan Tabassum/AFP/Getty Images

Teacher Denise Severing leads a math lesson at a Head Start school in Woodbourne, New York. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images