Fancy Apartments (or Condos) might have central water softner. Softner uses salt to regen. Arab maintaince man. Not unusual to bring salt in. Wrong salt in the wrong tank, and lots of dead rich people. Kill lots of kids by putting it in the pool. No bomb needed. 1 once per apartment should do it. Memorial Day seems logical.
But, hey...we cannot profile you know who.....what a shame in my book....foolish as well.
The authorities shouldn't use a rubber hose on them....but they could at least ask questions and check out stories.
How many Arab maintenance guys are in the States? With access to the HVAC systems of VERY LARGE FACILITIES? (New York subway? Shopping malls? Contractors to the Pentagon? How about a baseball stadium? Political rallies? hmmmm..... Some of these places have already been listed in warnings.) Just think about anywhere that there is a large concentration of Americans connected to the same air supply or water supply.