50 U.s.C. § 3024(i) 50 U.S C. § 3024(i) We have examples of pilots who stated that they 1.4(g) Atmospheric Phenomena: Natural atmospheric phenomena includes ice crystals, moisture, and thermal fluctuations that may register on some infrared and radar systems. 1.4(c)(g) 6.2(d) • (U) Although we cannot definitively classify any UAP occurrences in our dataset as caused by atmospheric phenomena, we also cannot rule out the possibility that these factors may account for some of what pilots have observed. (U) USG or Industry Developmental Programs: Some UAP observations could be attributable to classified USG aerospace programs or systems under development by commercial aerospace firms. We were unable to confirm , however , that these systems accounted for any of the UAP reports we collected. 50 U.S . C. § 3024(i) We have 1.4(c) 6.2(d) 50 U.S.C . § 3024(i) Foreign Adversary Systems: Some UAP may be intelligence collection platforms developed by China, Russia, another nation, or a non-governmental entity . They could also be a 1.4(c) Although IllS In addition, we 1.4(c) 6.2(d) (U) Other: Although most of the UAP described in our dataset probably remain unidentified due to limited data or challenges to collection processing or analysis , we may require additional scientific knowledge to ·successfully collect on, analyze, and characterize some of them. We would group such objects in this category pending scientific advances that allowed us to better understand them. The UAPTF intends to focus additional analysis on the small number of cases where there are initial indications that a UAP appeared to display unusual flight characteristics or signature management. 8 50 U.S.C. § 3024(i)