1.   The bomb was activated by remote control.

2.   And he pointed out that unless a pilot deliberately activated the bombs, they would not explode either in a crash or when dropped.

3.   Activate the bombs.

4.   But unless he deliberately activated the bombs, they would not explode, either in a crash or when dropped.

5.   Some bacteria have two similar quorum sensing systems, like a fail-safe system in which the bacterial bomb cannot be activated unless two keys are put in the lock.

6.   Workers would be told they had to flee immediately without using the phones because the phones could activate the bomb.

7.   The Palestinian driver pule that activated the bomb hidden in the car, killing himself and one of the policemen, Ayalon said.