The word 'sisters' makes me remember the info about the seven sisters who were the wives of various heads of state/high up officials.
Brian Mulroney's wife (Canada)
Cherrie Blair (Tony Blair's wife)
Michelle Obummer (Bummer's 'wife')
Condeleza Rice (?)
Can't remember the other three. I think also the Australian PMs wife from the early nineties??
Been so long I can't remember the exact details.
One of the things that they did was make a shit load of money on insuring plane loads of people and then having that plane drop out of the sky/crash. It turns out that that is quite easy to do as it seems all the insulation on new aircraft is pre-soaked with either jet fuel or some other highly flammable material. Also the auto pilot was an entry point in sabotaging a plane. Seems POTUS put a stop to that bit though.