The number of weapons in China’s nuclear arsenal is slowly growing, and the capability of those weapons is also increasing. The authors estimate that China has approximately 250 warheads in its stockpile for delivery by nearly 150 land-based ballistic missiles, aircraft, and an emerging submarine fleet. China is assigning a growing portion of its warheads to long-range missiles. The authors estimate that China’s arsenal includes as many as 60 long-range missiles that can reach some portion of the United States. The US intelligence community predicts that by the mid-2020s, China could have more than 100 missiles capable of threatening the United States.