The U.S. officially entered war with Yemen late Wednesday, launching strikes on Houthis for the first time, purportedly in retaliation for attempted missile attacks on American warships earlier this week. An anonymous U.S. spokesperson said the strikes destroyed three radar installations used to target the USS Mason over the past four days. The American warship had been operating out of the Bab al-Mandeb waterway between Yemen and East Africa, the Guardian reports.