I believe the two Boston Globe "controlled explosion" tweets mean: (poll 7061268)

I believe the two Boston Globe "controlled explosion" tweets mean:

1. Police knew about the "terrorist" bombings before hand.

2. The so-called Boston Marathon bombings were a bomb drill. No one was killed or injured.

3. The bomb drill went horribly wrong, resulting in real deaths and injuries.

4. The Boston Globe goofed in its two tweets. There was no "controlled explosion" planned that day.

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