25 years later, letting go of our permanent fight response may be how America heals

After 25 years, 100 million Americans have no memory of the day that changed everything. In an age of social media, disinformation and mistrust, that can be dangerous.

Americans marked the 25th anniversary of the Sept. 11 attacks Friday, remembering nearly 3,000 lives lost and the sweeping consequences of al-Qaida's...