After a Chinese balloon — which the Defense Department called a surveillance balloon — flew over Montana, where intercontinental ballistic missile (ICBM) fields are located, Montana GOP Senator Steve Daines wrote an urgent letter to Defense Secretary Lloyd Austin demanding a full security briefing.After the balloon was detected, Chairman of the Joint Chiefs of Staff General Mark Milley and vice chair Joint Chief Gen. Christopher Grady recommended that no “kinetic action” be taken because of possible falling debris, defense officials stated.“The fact that thi …