Yemen's Houthi rebels shot down two American MQ-9 Reaper drones in under a week, the United States military acknowledged Wednesday, further highlighting the regional spread of the Israel-Hamas war.

As the one-year anniversary of the war approaches, Houthis continue a campaign to target ships traveling through the Red Sea as U.S.-led airstrikes pound their positions in Yemen. That's imperiled a waterway that typically sees $1 trillion of trade pass through it, as well as crucial shipments of aid to war-torn Sudan and Yemen.