Counterterorism for Aviation

The Evolution of Common MANPADS Systems and Their Characteristics and Capabilities
System – Country of Original Manufacture – Maximum Effective Altitude (Feet) – Type – Yr Introduced Redeye USA <10,000 First generation IR 1967 SA-7A USSR <10,000 First generation IR 1968 SA-7B USSR 10,000–15,000 First generation IR 1972 Blowpipe U.K. <10,000 Command line of site 1975 RBS-70 Mk I Sweden <10,000 Laser beam rider 1977 SA-14 USSR 15,000–20,000 Second generation IR 1978 Stinger USA 15,000–20,000 Second generation IR 1981 SA-16 USSR 20,000–25,000 Second generation IR 1981 SA-18 USSR 20,000–25,000 Third generation IR 1984 Javelin U.K. <10,000 Command line of site 1984 Stinger POST USA 15,000–20,000 Third generation IR 1986 RBS-70 Mk II Sweden 20,000–25,000 Laser beam rider 1988 Mistral France 20,000–25,000 Cruciform array IR 1989 Stinger RMP Block I USA 15,000–20,000 Third generation IR 1990 Starburst U.K. <10,000 Command line of site 1990 RBS-90 Sweden 15,000–20,000 Laser beam rider 1991 SA-18 (IGLA) Russia 20,000–25,000 Third generation IR 1994 Starstreak U.K. 15,000–20,000 Laser beam rider 1993 Keiko II Japan 10,000–15,000 Focal plane array IR 1995 Stinger RMP Block II USA 25,000–30,000 Focal plane array IR 1996

Based on the above which MANPAD systems poses the greatest threat to U.S. airlines?
Based on the growing use of UAS and the information available, which type of UAS do you think poses the greatest threat to U.S. Airports and why?