diff --git a/education/unmanned aerial system/final.md b/education/unmanned aerial system/final.md
index bd941e8..9dc2a36 100644
--- a/education/unmanned aerial system/final.md	
+++ b/education/unmanned aerial system/final.md	
@@ -4,4 +4,6 @@ To determine if an MOA is active, you can refer to the phone number listed under
 
 An sUAS accident must be reported to the FAA within 10 days.
 
-Lightning is considered the most hazardous condition when flying in the vicinity of thunderstorms.
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+Lightning is considered the most hazardous condition when flying in the vicinity of thunderstorms.
+
+The presence of ice pellets at the surface is evidence of a temperature inversion
\ No newline at end of file