21. Joseph Stalin joking around the 1940s.
22. U.S. Army soldiers outside their cabin in Dyea, Alaska in 1899.
These troops were stationed in the town to keep the peace as tens of thousands of prospectors rested and journeyed through the area for the goldfields in the Klondike region of Yukon.
23. On 21 August 1911 Mona Lisa was stolen from Louvre.
The thief, Vincenzo Peruggia, was discovered and arrested two years later in 1913. The former Louvre employee simply walked into the museum, removed the famed painting from the wall, hid it beneath his clothes, and escaped.