After it was confirmed the skies were clear of enemy aircraft the 'all clear' would sound. It brought relief to countless thousands as they made their way wearily out of shelters to resume daily life.

The test flight took place in the same Mojave Desert area in California where Charles "Chuck" Yeager first broke the sound ...

Shot down during a WW2 Bomber Command raid - and captured; John Martin's Story, Part 2Shot down during a WW2 Bomber Command raid - and captured; John Martin's Story, Part 2 ...