CNN:

The two missile defense systems that the US delivered to Poland this week are part of a weapons system upon which the US military has heavily relied for nearly 40 years.

The deployment, announced Thursday by Vice President Kamala Harris, is intended to deter Russia and boost Poland’s security amid western concerns that the Ukraine conflict could spill into NATO-aligned nations.

The Patriot air defense missile system – Patriot stands for “Phased Array Tracking Radar to Intercept of Target” – is designed to counter and destroy incoming short-range ballistic missiles, advanced aircraft and cruise missiles.

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