(NECN: Kathryn Sotnik) - Two explosions heard at Boston Marathon finish line.
NECN reporter Kathryn Sotnik is on scene, and she says this is fast turning into a scene of chaos.
She says thousands and thousands of people are running and crying, converging, trying to get out of the area.
She says windows were blown out of buildings.
Kathryn has more from the scene.
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