Has the U.S. ever launched missiles towards itself to see if they can shoot them all down?

DailyPUMA is wondering if the U.S. Military has ever fired off dozens of missiles at the same time from different locations, at the U.S., to see how many they can effectively shoot down without detonating. Simply having a bunch of military ding a lings say they are ready for any incoming missile attack is WORTHLESS. PROVE IT.

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