Robert_A_Woodward wrote:There were two mass nukes on Mesa in October. The first (in early October) was the climax of a "terrorist" campaign that killed a bunch of people to cover up the evacuation of the inner onion. The nukes were also used to encourage the Mesa security forces to go on a rampage. It also was used to kill off those members of the inner onion that the Alignment couldn't (or decided against) evacuating. Albrecht's final flourish in late October killed off everybody the Alignment ran out of time to evacuate and destroyed every site used by the Alignment. Why would a residential tower hit in early October be hit again?
Why wouldn't the same building get hit twice, if some of the intended targets survived the first one? That of course assumes they were all in that tower for the second round, which they may not have been. Parents maybe not home, sister(s?) long out on their own with their own lives - the first nuke getting all of them would have been absurdly lucky; the second even more so since the timing on it wasn't preplanned. That was why the MAlignment had gathered so many of the elimination list in set locations - covered as "meetings" or "vacations" or the like to disguise the fact that the victims were being held specifically for the purpose of being evacuated or eliminated.
Face it, the McBrides are pretty high on the "knows too much" list. While they may not have known precisely what Jack and Zach did for the Alignment, they knew they both worked for the Alignment and approximately what they did in terms of professions. The overt Alignment, with its goal of individual, voluntary genetic improvement, would not have had much need for security forces (Jack) or physicists (Zach). The McBrides could not reasonably be expected to think their sons worked for the Benignment given their skill sets.
It's entirely possible the McBrides survived both rounds of nukes. We have no reason to believe they did, though, and if they did it's certain the Malignment has some other way of getting rid of them planned.