Stop asking questions like that! Life is scary. Brown people are scary. The American people are ready, willing, and able to abdicate their freedoms, liberties, and economic prosperity to the federal government for the promise of being kept safe from scary brown people with cigarettes.
standard procedure. in a case like this, it is not known what the disturbance was. the jet will shoot down the plane if it attempts to divert towards populated area.
like on 9/11, the plane that crashed in PA would be shot down before it attempts to ram into a building.