The 2008 US presidential election will be recorded in the annals of history as one of many firsts. On Wednesday night, Sen Barack Obama added two more to this expanding list when the Democrat presidential nominee aired a half-hour TV commercial - the first of its kind in the history of American elections - and for the first time in this election cycle campaigned with former President Bill Clinton, with whom he has had a strained relationship.
On June 30, Donald J. Trump became the first US president to set foot in North Korea. Trump made history when stepped across a low concrete marker accompanied by North Korean leader Kim Jong-un and walked a few steps into the North. The two leaders agreed to have their negotiators resume an effort to reach what has so far been an elusive nuclear deal. US President Donald J. Trump, accompanied by North Korean leader Kim Jong-un, stepped into North Korea at the border village of Panmunjom on June 30. Trump is the first sitting US president to set foot in North Korea. (Reuters/Kevin Lamarque)