Europe Nazi art cache revealed two years after discovery. Why the delay?

In late 2011, German authorities discovered more than $1 billion worth of art believed seized by Nazis – and only announced the find Tuesday after a magazine broke the story.

Ullstein Bild/Reuters/File

It's one of the biggest discoveries of Nazi-seized artwork in decades: a trove of 1,400 works of art – including a previously unknown Marc Chagall painting. The collection's total value is estimated at 1 billion euros ($1.3 billion) by the magazine that broke the story.