Yemen's Houthi rebel forces killed at least 40 people Aug. 1 in a complex attack on a military parade in the port city of Aden involving a ballistic missile and drone. The victims included members of the Security Belt, a local force trained and supported by the United Arab Emirates. Eyewitnesses said the missile struck behind the speaker's dais after a general had just concluded a speech. The Houthis said they used a medium-range ballistic missile and an explosives-laden Qasef-2K drone to conduct the attack, which killed Brig. Gen. Monier al Yafie. The civil conflict between the Saudi-backed Yemeni government of Abd Rabboh Mansour Hadi and Iran-aligned Houthi rebel forces shows no sign of stopping even as important Yemeni coalition partners like the United Arab Emirates are readjusting their force posture in the country....