While North Korea's second launch of an intercontinental ballistic missile dominated headlines late last week, Pyongyang quietly unveiled renovations around the capital's biggest landmark: a futuristic, pyramid-shaped 105-story hotel, the world's tallest unoccupied building.Walls set up to keep people out of a construction area around the gargantuan Ryugyong Hotel were pulled down as the North marked the anniversary of the Korean War armistice. Revealed were two broad new walkways leading to the building and the big red sign declaring that North Korea is a leading rocket power.