There is an ongoing debate about the continued viability of the aircraft carrier. Proponents point to the fact the carrier provides a range of capabilities essential for power projection and sea control that, without basing rights, cannot be provided in any other way. Opponents note that several nations have drones and cruise missiles that vastly outrange the short-legged carrier air wing. They also note that China has developed a ballistic missile specifically to kill carriers. A particular concern is that a carrier and air wing alone cost $20 billion and 5,000 Americans live aboard. This is an enormous investment of eggs is a possibly fragile basket.