Part 2: ‘I Had Never Gone Toward Explosions Before’

When WGBH reporters start making their way to the Merrimack Valley, all they know is that buildings and homes are blowing up and catching fire. When they arrive, they discover smoke-filled streets, frightened residents and entire communities wondering if this is over, and what comes next? Soon, one thing is clear: It’s not safe to go back home tonight, and no one knows when it will be.