It's not quite the same. Calling a cruise missile an unmanned bomber does not match the effect.
A cruise missile gives you one big bang, enough to ruin a runway. Drones on the other end can keep buzzing in the sky for hours, and destroying whomever still tries to take off, or repair the runway.
A cruise missile gives you one big bang, enough to ruin a runway. Drones on the other end can keep buzzing in the sky for hours, and destroying whomever still tries to take off, or repair the runway.