depends on what you call a weapon. As far as the military is concerned, info is every bit as much a weapon as a bomb is. One of the newest weapons is armed unmanned drones that have flight times of 30+ hours. As soon as those can be put to use on the battlefield it will make a large dent in the ability of using radio controlled roadside bombs as these drones can fly over convoy routes hours beforehand and catch some of the people looking to plant or detonate these bombs.