'Lost' Answer - Why Richard Said He Saw the Losties Die

Richard tells Sun he saw Jin and the other time travelers die in the past, he remembers it clearly (Ep: 5x15, Follow the Leader). Yet they return to the present alive. How is this possible?

• After the blast of white light that happened when Juliet hit the bomb, Richard just assumed that they had all died because they disappeared.
• The group really did die, but something happened to change the past, keeping them alive in the timeline that played out to the present.

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