On Thursday morning, after a small plane crashed into an Austin, Texas, office building, he was breaking them, having rushed into the burning structure to help people escape.

All things being equal, which they rarely are, the higher the cyclical stress level on an aircraft structure, the fewer the number of reversals it can withstand before breaking.

You can break this down structure even further, marking the punctuation (the period, comma, and hyphen) or breaking the zip code into two pieces.