Should all nukes be destroyed? Russia's leader Vladimir Putin has been making threats to use nuclear weapons — again.
Alarm rises over Russian nuclear space threat
Star Wars: Reports that Russia is pursuing a nuclear space-based weapon have caused fears in Washington. Glossary
USA - The United States of America is a country in North America. It has a population of 329 million.
Russia - The largest country in the world by area. It has a population of 144 million people.
Nuclear weapon - A bomb or other weapon that uses nuclear energy to cause a big explosion.
Satellites - A satellite is a small object that orbits, or revolves around, a larger object in space.
Warheads - The device containing nuclear materials, fitted onto a missile, torpedo or bomb.