Riccardo Ehrman asked the historic question that led to East Germans tearing down the wall in 1989. The BBC looks at a selection of history's powerful protests and why only some achieved their goals.

A section of the Berlin Wall, gifted to Hudson County more than 15 years ago, has finally found its permanent home in Secaucus’ Laurel Hill Park. Hudson County Executive Craig Guy unveiled the new ...

In 1964, the Berlin Wall stood as one of the most heavily guarded borders on Earth. Above ground, soldiers watched for defectors. Below ground, a small group of men quietly dug for freedom. This is ...