KEY POINTS
  • Russia quietly conducted the world's longest surface-to-air missile test, according to sources with direct knowledge of U.S. intelligence about the weapons program.
  • The S-500 surface-to-air missile system successfully struck a target 299 miles away.
  • Russia claims that the ground-based missile system is capable of intercepting hypersonic missiles, drones, aircraft as well as stealth warplanes like the F-22 and the F-35.
Russian President Vladimir Putin and Defense Minister Sergei Shoigu at the Navy Day parade in St. Petersburg, Russia, on July 30, 2017.

Russia quietly conducted the world's longest surface-to-air missile test, according to sources with direct knowledge of U.S. intelligence concerning the weapons program.

The S-500 surface-to-air missile system successfully struck a target 299 miles away, which the U.S. assessed is 50 miles further than any known test, said the sources, who spoke to CNBC on the condition of anonymity.