Military officials are still warning Chicago-area residents of the possibility of ‘unaccounted’ pyrotechnic devices washing up on the shores of Lake Michigan this week. Here's what you need to know if you encounter one.⁠ ⁠ Tap the 🔗 in our bio for details⁠ ⁠ #military #uscg #coastguard #warning #chicago #lakemichigan #pyrotechnics