Two implacable U.S. foes have locked into an unlikely marriage of convenience. Yemen's Houthi rebels and al-Shabaab—al Qaeda's wealthiest affiliate—were long divided by sectarian lines. But shared hatred of the West and a trade of weapons, training and cash have brought them together. Michael M. Phillips explains how a single broker helped set this alliance in motion before a U.S. airstrike killed him. His legacy is a dangerous partnership that threatens a strategic maritime chokepoint for the global oil trade and risks further destabilizing the Middle East.

Plus, Army Secretary Dan Driscoll resigns after months of tension with Pete Hegseth, and why Seattle and D.C. are drawing more families with kids.