Hypersonic missiles are advanced weapons that can travel at speeds greater than five times the speed of sound, or Mach 5. This allows them to reach their targets much faster than traditional missiles, making them harder to detect and intercept. They can fly at varying altitudes and change direction mid-flight, which adds to their unpredictability. These missiles are being developed by several countries, including the United States, Russia, and China. The technology behind hypersonic missiles is still evolving, and they are seen as a significant advancement in military capabilities, potentially altering the balance of power in global defense strategies.