Onibus 174
Several posts here refer to "the documentary".
Just to clarify, this documentary is "Onibus 174" (or "Bus 174" as its English title), which was assembled and produced by Jose Padilha in 2002 from live footage shot during the 2000 standoff with the hijacker, which had aired live on television, together with interviews and additional documentary film of Rio's underclass economic and social circumstances from which the hijacker came.
In contrast, Bruno Barreto's 2008 "Ultima Parada 174" (or "Last Stop 174") is a reconstruction of the event, using actors. The two films complement each other, and it's worthwhile watching both.