U.S. presidents[edit]
President Bill Clinton displayed several racks of challenge coins, which had been given to him by U.S. servicemembers, on the credenza behind his Oval Office desk. These coins are currently on display at the Clinton Library. The challenge coins appear in the background of his official portrait, now hanging in the White House.
President George W. Bush received a challenge coin from a Marine combat patrol unit during his short but unexpected visit to Al-Asad Airbase in Anbar province, Iraq, 3 September 2007.[14]
President Barack Obama placed challenge coins on the memorials of the soldiers killed in the 2009 Fort Hood shooting.[15]