User blog comment:GunsnadGlory/Washington ate a sandwich.../@comment-1310192-20120803160434

...Unless every single sandwich is taken by David Tennant in his TARDIS and taken to early XX century Bosnia where Gavrilo Princip would go for one and thus kill Archduke Franz Ferdinand or such, the butterfly effect for something that small (once again, with a few exceptions) would take centuries to build in to a large level.