Web Extra: Sept. 11 Left An Indelible Mark

Where were you on Sept. 11, 2001?

It's probably one of the only days in your entire life that you remember almost exactly what you did, where you were and how you felt. It was a life-altering, world-defining day.

WBUR is collecting your memories of Sept. 11 on Twitter, using the hashtag #911flashbulb. We're looking for that flashbulb moment, that one indelible memory that immediately takes you back to that fateful morning.

Your #911flashbulb memories