This is just the start of our working on 3D printed rockets. We have the launch and detonation figured out, now we need to work on getting the accuracy figured out.

Before anyone goes out and tried this on their own, remember that a Destructive Device is defined as: "(1) any explosive, incendiary, or poison gas, (A) bomb, (B) grenade, (C) rocket having a propellant charge of more than 4 ounces, (D) missile having an explosive charge of more than 1/4 ounce, (E) mine or (F) similar device." Rockets such as these are classified as Destructive Devices and subject to all relevant laws & regulations.