A look at Morse code and other forms of communication.
The classic Newsreel story of the rescue of British troops from the beaches of Dunkirk.
Crews of RAF Wellington bombers take off for a flight.
New powerful 10 ton bombs are tested.
RAF bombers and fighter planes attack enemy installations and shipping.
Aerial shots from bomber during night raid and on daylight return home.
Great shots of RAF bombing crews preparing for a mission.