World News Tonight With David Muir - February 20, 2015

American Sniper Trial: The jury must decide if shooter Eddie Routh was insane based on differing opinions from doctors.

UCLA Superbug: A bacterial infection kills 2, leaves five sickened, and it could potentially spread beyond Los Angeles

Las Vegas Road Rage: As the search for a second suspect continues, new details emerge on what exactly happened at the scene

Oscars: ABC's Robin Roberts tells us about the advice Neil Patrick Harris received from a former Oscar host

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