For over a week, law enforcement in Ferguson, Missouri, have been trying out a wide variety of so-called less-lethal weapons as they attempt to disperse people protesting the shooting of Michael Brown. To figure out exactly what weapons were being used, Robin Jacks (@caulkthewagon) and Joanne Stocker (@sabzbrach) have been kind enough to compile a spreadsheet documenting the spent munition shells left behind after smoke clears.