President Barack Obama took a detour on his Asia trip Monday when he dined with celebrity chef and adventurous eater Anthony Bourdain in Vietnam.
Danger and death lurk with every step. It's difficult to breathe -- the oxygen level is a third of what's available at sea level. The winds are fierce and brutal. The weather is unpredictable. Temperatures at the summit can be colder than minus 30 degrees Fahrenheit.