KEY POINTS
  • India's purchase of Russian-made S-400 missile systems is subject to U.S. sanctions under the Countering America's Adversaries Through Sanctions Act.
  • It's unclear whether the U.S. will grant India a sanctions waiver after New Delhi inked a $5 billion deal with Moscow for the platform.
  • Defense Secretary James Mattis stresses Monday that this wouldn't be the first time India has purchased weapons from the Kremlin.
Russia's S-400 surface-to-air missile system is seen during a military parade in Moscow's Red Square.

WASHINGTON — India risked U.S. sanctions when it agreed to a $5 billion deal to buy Russian missile systems. But two months after India signed the pact, it's not clear whether the Trump administration will issue a waiver or follow through with any penalties.

India's purchase of the Kremlin's S-400 Triumf surface-to-air missile system is subject to potential U.S. sanctions under the Countering America's Adversaries Through Sanctions Act, a measure that was signed by President Donald Trump in 2017.