This most violent of scenes takes place in the first 35 minutes and the last 35 minutes showing people being shot and killed by guns and explosives.
The beginning scene shows an explosion going off showing the aftermath with people bleeding and missing limbs.
The movie is pretty realistic and shows blood and some gore (etc. bullet sounds & missing limbs) and also shows the deaths of teenagers.
The starting of the movie there is a slaughter with machine guns and then a suicide bombing. At the end there is another long and extended scene of violence thats brutal and bloody. One of the main charectors is captured and beaten brutally and it is implied that terrorists are going to film themselves beheading him. Some graphic material is shown, but only briefly.