The U.S. Marine Corps' Valkyries will run using Northrop's autonomous Prism software, and use a sensor and technology package tailored to fit in a drone.
The PAC-3 is an interceptor missile engineered to strike and destroy inbound adversary missiles, including tactical ballistic missiles and cruise missiles.
Increasing international tensions, global warming and a changing world economy have put Greenland at the heart of the global trade and security debate.