What caused a small portion of the food universe to explode Monday was a photograph of the president eating bun cha with Anthony Bourdain in the Hanoi restaurant Bun Cha Huong Lien.

What caused a small portion of the food universe to explode Monday was a photograph of the president eating bun cha with Anthony Bourdain in the Hanoi restaurant Bun Cha Huong Lien.

What caused a small portion of the food universe to explode Monday was a photograph of the president eating bun cha with Anthony Bourdain in the Hanoi restaurant Bun Cha Huong Lien.