From the family behind Columbia Heights’ Pho Viet.

It’s not every day that a tiny mom-and-pop ethnic restaurant is so hotly anticipated. But ever since Prince of Petworth posted a picture of the maroon awning and “Coming Soon” banner, local blogs have been buzzing about the prospect of more Vietnamese food in the city. Pho 14 in Columbia Heights finally opened on Wednesday, and judging by the lines out the door this weekend, D.C. can’t get enough pho. Pho 14 offers 19 different…