subpoenas for producing live testimony before the grand jury under oath which are all transcribed. so that s how an investigation is conducted. you get it all under oath. you get it all transcribed. you get the tudocuments and you review them and start questioning people around the transaction. it is not likely to get the top of the food chain at the beginning of the investigation. you work your way up is the normal way to do it. it is not at all surprising that we have reached a phase involving the grand jury. so there are many, many leads for mr. mueller to follow. and one of those, of course, is the intercepts by u.s. government, nsa in particular of russians talking to russians which will give you a road map of who to talk to.