The authorities also banned people riding pillion on motorcycles and bicycles for one month.

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Samantha Pillion, an incoming freshman at Wellesley College, agrees that Facebook friendships aren't necessarily built to last.

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The rider was slim and the pillion passenger was described as being stocky.

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The detective constable added that police believed the second helmet was intended for Mr McLaughlin and the the plan was that he would be a pillion passenger on the motorcycle following the intended mortar attack.

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