. >>> we go now to general joseph votel, former centcom commander overseeing operations in the middleto have you with us. i want to pick up where we left off with the national security adviser. he said the u.s. has elevated threats against u.s. forces, elevated risks of the conflict spreading. what are the trigger points you are concerned about? >> thanks. good morning, margaret. good to be with you. i think the thing i've been concerned about and probably many have been concerned about is that any miscalculation along the line can move this to a different level, so, you know, an attack on an american installation, whether it's military or diplomatic or commercial, that causes casualties, significant casualties and death, i think could significantly change the calculus for us. it's certainly a much broader attack by the so-called iranian threat network, whether hezbollah or whether it's iranian aligned militia groups in syria, to broaden the conflict. i think these are all aspects that could lead to a widening of the conflict. >> there have already been 20 militia attacks. 19 service