President-elect Donald Trump’s inauguration on Jan. 20 will be the first of its kind to boast foreign heads of state as attendees. Trump broke with more than a century and a half of tradition to invite a wide array of national leaders and political figures to the inauguration, making the occasion historic not only for Trump, but for the guests as well. No foreign head of state has attended the U.S. presidential inauguration since at least 1874, when the State Department began recording such things. Trump has invited a wide array of guests, though some have elected to send proxies in their stead and others have been prevented from attending due to extenuating circumstances….