The only way to legally enter Myanmar for an extended visit is by air from Saigon or Hanoi. For visitors entering overland from Thailand, short-term visas are issued for “visa runs” and regional travel only. Travelers who enter at Tachilek, for example, are required to stay within the eastern territories—and exit within 14 days. Push your luck on this border, and you’ll find yourself on the wrong end of an AK-47 and maybe arrested as a spy. Activists sneak into Burma under cover of night—at great risk to themselves—to provide medical aid and education to the country’s displaced ethnic minorities.