'The Shenandoah, commissioned by the U.S. Navy in 1923, was its 1st Zeppelin-type airship filled with this gas'
helium
FILLED UP: The Shenandoah, commissioned by the U.S. Navy in 1923, was its 1st Zeppelin-type airship filled with this gas
The Shenandoah, commissioned by the U.S. Navy in 1923, was its 1st Zeppelin-type airship filled with this gas
The Shenandoah, commissioned by the U.S. Navy in 1923, was its 1st Zeppelin-type airship filled with this gas
FILLED UP
helium
FILLED UP