Skipping the long introduction...
The original Akron during its November 1911 trials at Atlantic City, New Jersey.
This Vaniman-Goodyear airship attempted a trans-Atlantic crossing from Atlantic City in 1912 but exploded at 500 feet soon after its ascent over the inlet, killing the five crewmen aboard, including Melvin Vaniman and his brother Calvin. Identified by its semi-rigid keel design, box-tail rudder and placement of the four, 2-bladed propellers.
The 100th anniversary of the first Akron disaster was last month on July 2nd.