this case, sometimes gates traffic is halted at the gate to manage flow on the airport. it is a physics issue. but again i appreciate that and if you share with us after the briefing the details of this we'll certainly pass it on. >> absolutely. >> can i ask one more question. now there has been several weeks since the decision to make this mandatory, what is the secretary's policy or decision on any troops who refuse to get the vaccine? >> great question. what the secretary has communicated to the military departments is to execute this mandatory vaccination program with skill and professionalism which we always do but with a measure of compassion. so for a member who still objects. obviously you can ask for an exemption on religious grounds and you can be exempt if you have a pre-existing condition that your doctor advises you not to get it obviously. but if it's an objection