Designer Evan Stremke’s Invitation to an Assassination minimalist posters are morbid and conflicting. They’re simple and crammed with murder specifics, active participants’ affiliation insignia and conspiracy theories surrounding the high-profile assassinations of heroes and villains of world history, like the four broken strings for four shots fired into Lennon. There are also Easter Eggs. Does that Bin Laden assasination symbol for “Operation Neptune Spear” look a bit like a cross?