"The Summit" incorporates archival video footage from the ill-fated mountaineering mission, reconstruction scenes shot on K2 — capturing its top-of-the-world vistas in all their majesty — and talking-head interviews with survivors, friends, and family members. (And with actors playing some of them — this doc's integrity is a bit shaky.)

But because the filmmakers try to solve the mystery of the deaths (especially that of Ger McDonnell, a charismatic Irishman), key events of the climb are revisited (and reenacted) from different participants' vantages, making the film at once repetitive and puzzling. There is a lot of finger-pointing. Assertions are made, theories offered, but not much in the way of certainty.

One thing is clear, though. The people who lined up to tackle this 28,251-foot bump in the earth were a unique lot: brave, fearless, crazy, or some combination thereof. From Norway and Spain, South Korea, Serbia, Pakistan, France, Ireland, and Nepal, the climbers who worked their way along the snow and ice, gullies and slopes that summer were living their dream.

And then they died.