Russia to Bolster Nuclear Shield Due to 'Colossal Threats'

Russia is planning to make its nuclear defenses stronger because it believes there are big threats to the country.

The head of Russia's nuclear program said this is very important for Russia's safety.

The United States is also working on improving its nuclear defenses, like ways to stop missiles.

China is also building up its nuclear weapons.

Russia and the United States have the most nuclear weapons, with China having the third most.

Russia feels a stronger nuclear shield is needed to protect itself.