1.   The Osprey can take off and land like a helicopter but, with rotors that tilt forward after takeoff, can also cruise at the speed of an airplane.

2.   Experts decided to demolish the building, because rescue action could not be continued as the building tilted after the explosion and rescuers feared it could collapse.

3.   The building tilted after the explosion and experts feared it could collapse when rescuers would start digging through the rubble.

4.   Six buildings collapsed or were dangerously tilting after the earthquake.