Of all the speculation on the net about the viability of the pipe ‘bombs’ the most consistent part seems to be the lack of a detonator or at least a detonator that looked like it would work. I have come to believe that whatever these items were made of, the intent was to incite fear rather than to do damage.
Yep, the timers were 1-hour egg timer types and the packages were in place for more than an hour. It is pretty clear that they were just for show.