Intercontinental Ballistic Missiles (ICBMs) are long-range missiles designed to deliver nuclear warheads over distances greater than 5,500 kilometers. They are launched from land-based silos or mobile platforms and follow a ballistic trajectory, meaning they are powered during the initial phase of flight and then coast through space before descending toward their target. ICBMs are a key component of many countries' nuclear deterrent strategies, including those of the United States and Russia. Their ability to strike targets across continents makes them a significant factor in global military balance and international relations.