Complex sentence: Until the crisis ended, there was a continual risk of the accidental outbreak of nuclear war, for example, when an unknown Soviet anti-aircraft battery commander shot down an American U- 2 surveillance plane without authorization.
Split into simpler sentences: Until the crisis ended, there was a continual risk of the accidental outbreak of nuclear war. For example, when an unknown Soviet anti-aircraft battery commander shot down an American U- 2 surveillance plane without authorization.