USAF likely to have prototype hypersonic missiles by 2020

According to the head of U.S. Air Force Research Laboratory, Maj. Gen. Thomas Masiello, the service will likely have prototype hypersonic missiles by 2020 that can eventually be deployed for operations.

X-51A Waverider
By US Air Force [Public domain], via Wikimedia Commons

Although flight testing of the hypersonic X-51 ended in 2013, the service is still developing engines that could travel at or above Mach 5.

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