The U.S. over the weekend conducted its first test of missile technology that was previously banned under a Cold War-era treaty since the Trump administration tore up the agreement earlier this year.

The test of the ground-launched cruise missiles took place at San Nicolas Island in California at 2:30 p.m. local time on Sunday, according to the Defense Department. The missile flew more than 300 miles before striking its target in what officials describe as a successful test.

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