Tensions between the United States and Russia have sharply escalated as Russian President Vladimir Putin unveiled a new nuclear-capable submarine, while US President Donald Trump has ordered the testing of American nuclear weapons. The announcements signal a dramatic increase in global risk, with experts warning of a potential conflict that could spiral into World War III.
The developments come amid decades of simmering hostility between the two nations. Russia's military expansion and the US response have raised fears of a catastrophic confrontation.
