I understand that Gavrilo Princip was probably not eating a sandwich, but he was at a deli. What is a likely option for Gavrillo? I heard that it was around 11 AM, and he was at a deli.
Well, he wasn't eating, period. The matter of Princip at Schiller's Delicatessen has been examined before. u/frederfred1 and u/QuickSpore both analyse the matter here, and both of them also cite an article from the Smithsonian Magazine, penned by our very own u/mikedash. Of course, should anyone have any further contribution on the matter, they're more than welcome to post as well!