US quake cracked Washington Monument
The rare earthquake that rattled the US east coast yesterday has cracked the top of the iconic Washington Monument, prompting officials to close the building indefinitely.
The giant stone obelisk, Washington's tallest edifice at 169 metres, draws hundreds of tourists a day.
But Tuesday's quake opened a 10 centimetre-long fissure in the building, raising fears of more serious structural damage not visible to the naked eye...