"COMMON" SENSE !!!

WHAT IS COMMON TO THE FOLLOWING EVENTS DESCRIBED BELOW:

1. CONTINENTAL AIRLINES FLIGHT 3407 CRASHED INTO A HOUSE IN CLARENCE, NEWYORK ON FEB 12TH, 2009.

2. THE OPENING CEREMONY OF THE ATHENS OLYMPIC GAMES TOOK PLACE IN AUGUST 2004.

3. HURRICANE CHARLEY MADE LANDFALL IN SOUTH FLORIDA IN AUGUST 2004.

4. THE ASTEROID 2004 MN4 WILL MAKE ITS CLOSE ENCOUNTER WITH THE EARTH IN 2029.