As the sun set over the Potomac River at National Harbor, Maryland, the Navy League's Sea-Air-Space event came to a close. The steady flow of enthusiastic messages on Twitter suggested it had been a hit with many of its attendees.

Defense Secretary Ash Carter emphasized high-end innovation in his address.

How the U.S. Marine Corps maintains its high standards.

Boeing displayed its high-altitude sub-hunter, the HAAWC.

An audience learned how networks underpin fifth-generation warfare.

A cautionary note.

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