Missile defense test reportedly fails after sailor presses wrong button

A missile defense test went awry last month after a Navy sailor accidentally pressed the wrong button, an investigation into the matter revealed.

The Missile Defense Agency conducted a test of the SM-3 Block IIA missile interceptor in late June. A medium-range ballistic missile was launched from the Pacific Missile Range Facility in Kauai, Hawaii, the MDA explained in a statement at the time. The Arleigh Burke-class guided missile destroyer USS John Paul Jones detected and tracked the missile using the on-board radars and launched an SM-3 Block IIA interceptor, which ultimately failed to intercept the target.

An MDA investigation into the failure revealed that a sailor pressed the wrong button, causing the missile to self-destruct. The MDA reported that there were no problems with either the SM-3 Block IIA interceptor or the Navy’s Aegis combat system, according to Defense News.

A Standard Missile-3. Photo courtesy of US Navy.

A Standard Missile-3. Photo courtesy of US Navy.

A tactical datalink controller mistakenly identified the incoming ballistic missile as friendly, causing the missile to unexpectedly self-destruct mid-flight, according to sources familiar with the recent missile intercept test.

The test in late June was the fourth flight test of the SM-3 Block IIA interceptor, which is being developed by Raytheon and is a joint missile defense project between the US and Japan. The new interceptor was developed to counter the rising ballistic missile threat from North Korea.

North Korea has tested a batch of new short-, medium-, intermediate-, and long-range missiles this year, increasing the threat to its neighbors and extending the danger to targets in the US.

US deploys ballistic missile defense system to south korea.

US Pacific Command has deployed the first elements of the THAAD to South Korea. Photo courtesy of DoD.

The failed test was preceded by a successful test in May of the ground-based, mid-course defense system, which defends the US against intercontinental ballistic missiles. An interceptor launched from Vandenberg Air Force Base in California eliminated a mock long-range missile fired from the Reagan Test Site on Kwajalein Atoll in the Marshall Islands in the Pacific. Earlier this month, the US successfully tested the Terminal High Altitude Area Defense system against an intermediate-range ballistic missile, with a THAAD unit in Alaska eliminating a target missile launched from an Air Force Cargo plane to the north of Hawaii.

The failure of the SM-3 Block IIA, which was tested successfully in February, initially represented a setback. That the cause of the failure was likely human error may come as a relief for those involved in the weapon’s development.

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