An internal Marine Corps review touts the performance of the RQ-11B Raven unmanned aircraft system but concludes Marines operating the drone need more robust training. The Raven B, made by AeroVironment, is a 4.2-pound, back-packable, hand-launched drone built for rapid deployment and high mobility. The Marine Corps introduced the system in 2008 to replace the RQ-14 Dragon Eye. The Army and foreign militaries also use the drone. Day and night, the system provides low-altitude, real-time video imagery for "over-the-hill" and...