Silicon Valley-backed Covenant unveils low-cost, mass-producible cruise missile ↧ ↧ Silicon Valley-backed Covenant unveils low-cost, mass-producible cr... Defense startup ​Covenant on Wednesday unveiled a heavy-payload, long-range cruise missile it says can be quickly mass-produced at a ‌relatively low cost, in the latest challenge to major U.S. weapons makers from some of Silicon Valley's biggest investors.