Lingering memories: Vietnam, Hiroshima

Bun cha Huong Lien, an inexpensive street food shop in Hanoi, Vietnam, was made famous overnight on Monday with visits by two unexpected guests.

US President Barack Obama and CNN celebrity chef Anthony Bourdain were seen squeezing around a small table, enjoying cold local beer and grilled pork patties served in a bowl of fish sauce, along with vermicelli noodles, herbs and lettuce on the side.

By the time Obama was leaving the eatery, he was surrounded by crowds of Vietnamese greeting the president of a nation that was once Vietnam's bitter enemy.