Hypersonic vehicles are advanced aircraft or missiles that can travel at speeds greater than five times the speed of sound, or Mach 5. These vehicles are designed to operate in the atmosphere and can reach altitudes where traditional aircraft cannot. Their unique capabilities make them suitable for various applications, including military operations and space exploration. The development of hypersonic technology involves complex engineering and materials science to withstand extreme temperatures and pressures. Countries like the United States, China, and Russia are investing in hypersonic research to enhance their defense systems and maintain strategic advantages in global security.