Action movie which shows the story of a terrorist attack on the US president from different characters' perspectives [closed]

Time frame (approx)

I have watched this movie around 2008-2009, not sure of actual release date though (maybe 2006-2007 rough guess), watched in DVD

Genre

Action, Color Movie

Plot

This movie basically revolves around a terrorist trying to attack US president and kill when he comes for speech. This terrorist will also have a girlfriend. They show the story from different people perspective, from a terrorist, from a cop and from a guy. (Please note this is the major highlight of the story).

This story also includes a black person, a tourist (please don't take it as racist) who will be always holding camera and trying to record all the events, he also came to listen the speech of president during this time he meets a child with mother, he will be friendly with her.

While he was recording, terrorist shoots the president he also records this one, after actual attack happens cops try to see the accused from his camera. And after attack child and mother goes missing, and he will take care of that child.

At one point during chasing terrorist sees same child crossing the road and child gets scared and stops in front of middle road, at this point again story goes reverse and they show story from another perspective.

Language

I have watched in English, it includes hollywood actors I don't know name though.

It's one of the finest movie I have watched which shows same story from different character perspective, and builds story based on that. I forgot name. Can someone please help? I have tried to recall story as much as possible as I have watched it many years back.