The mistake that toppled the Berlin Wall

Vox:

One of the Cold War’s biggest moments began at a routine press conference.

Today is the 30th anniversary of the fall of the Berlin Wall, one of the most momentous events of the 20th century. I remember watching it on TV and thinking, “This can’t be happening. There’s no way they will let this continue. It’s going to end in bloodshed.” Thankfully, it didn’t.