As the enemy forces attacked with even greater ferocity, unleashing a barrage of rocket-propelled grenades and recoilless rifle rounds, Staff Sergeant Romesha identified the point of attack and directed air support to destroy over 30 enemy fighters.
The authors even identified a universal "tipping point" in the life cycle of new words: Roughly 30 to 50 years after their birth, they either enter the long-term lexicon or tumble off a cliff into disuse.