“Soon there will be enough [armed drones] in the strategic stockpile to launch more than one drone operation in multiple battle fronts at the same time.”“Yemen's Houthis threaten more drone attacks,” Reuters, January 13, 2019, https://www.reuters.com/article/us-yemen-security/yemens-houthis-threaten-more-drone-attacks-idUSKCN1P70E1.