A failed assassination attempt against Venezuelan President Nicolás Maduro on Saturday was mounted with explosive-armed drones, according to news reports. Nine days earlier, and on the other side of the world, terrorists claimed to have sent an armed drone to attack the international airport in Abu Dhabi, the capital of the United Arab Emirates. No one was killed in either case, and the circumstances of both remain murky. But a new and dangerous era in non-state-sponsored terrorism clearly has begun, and no one is adequately prepared to counter it.

The deadly civil war in Yemen has reached a climax after three ugly years. No one can know for sure, but it looks like the coalition led by Saudi Arabia is on the verge of a major victory that could push the Iranian-backed rebels into an enduring cease-fire.

The legitimate Yemeni government, backed by Saudi Arabia, Bahrain and the United Arab Emirates, is poised to retake control of the vital port of Hodeidah, Yemen’s fourth-largest city and its principal port on the Red Sea. Yemen depends on imports to survive and Hodeidah is the port of entry for most outside goods. International aid groups worry a long-term siege there could disrupt the already-limited flow of medicine and food into the country. But the pain is worth the gain – especially for U.S. interests – because of Hodeidah’s strategic importance.

One day, we imagine, drones will carry products right to consumers’ doorsteps. Retailers, supermarkets and restaurants will deploy squadrons of remotely controlled flying machines to deliver whatever people want whenever they want it.

At least that’s the popular lore. Unfortunately, the reality is different. For now, broad adoption of drone delivery is neither economical nor practical. Today’s commercial drones simply can’t carry anywhere near the weight of ground vehicles. They also are a lot more expensive to operate than trucks or trains. On top of that, air traffic controllers couldn’t manage them safely nor would the public tolerate them constantly buzzing their neighborhoods – even if they could be managed.

The future of drones is in the data not the products they can deliver.

Since 11 September 2001 the United States has been able to drive the global counterterrorism agenda as it saw necessary. Those days are over. The global environment has permanently shifted. The open rivalry with Moscow and growing competition with China are going to increase the potential costs on U.S. counterterrorism activity and outright restrain it in others.