Washington (CNN) -- A U.S. missile defense test failed Sunday when a long-range missile missed its target because of radar problems.





The Defense Department said a target missile was launched from an Army test site at Kwajalein Atoll in the Marshall Islands at 7:40 p.m.





Six minutes later, a second missile was launched from Vandenberg Air Force Base in California, to find the first one and destroy it.





Both missiles flew successfully, but missed each other because of a problem in the sea-based X-band radar, the department's Missile Defense Agency said.





The X-band radar sits atop a modified floating oil platform and provides information about incoming missiles so military officials can launch a response.





"Both the target missile and ground-based interceptor performed nominally after launch. However, the sea-based X-band radar did not perform as expected," the agency said.





Officials intend to investigate the cause of the interception failure.
What was fired from the California base? What happened at base What was led to test failure? What caused the test to fail? Where was the test missile fired from? What was fired from a Pacific atoll? What was fired from a California base?
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question: What was fired from the California base?, answer: a long-range missile | question: What happened at base, answer: second missile was launched | question: What was led to test failure?, answer: radar problems. | question: What caused the test to fail?, answer: radar problems. | question: Where was the test missile fired from?, answer: Kwajalein Atoll in the Marshall Islands | question: What was fired from a Pacific atoll?, answer: target missile | question: What was fired from a California base?, answer: a second missile