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Our memories of “big events” are generally collective in character. Their status as such manifests in a number of ways, but an important one is that their cognitive traces and triggers become intertwined with representations — images, narratives, and so forth — found in local and mass culture.

This applies to macro-collective events, such as election nights, massacres, assassinations, terrorist attacks, and sporting championships. It also operates in the context of localized happenings. Our recall of them — of, for example, the birth of children, the death of loved ones, and marriage proposals — owe a great deal to both the testimonies of others involved and to the accounts of similar events circulating in mass culture. 
In that spirt, I link to my own narrative of September 11, 2001. For one altogether more interesting, see Barry Ritholtz (via). In favor of forgetting, see “El Snarkistani.”