21.   A plane also slammed into the Pentagon, the US military headquarters in Washington, D.C.

22.   A Russian Defense Ministry plane slammed into a mountain while trying to land in bad weather Wednesday evening in Georgia.

23.   A plane also slammed into the Defense Department, bringing the seat of government itself under attack.

24.   A small plane slammed into the ground at an air show Saturday, sending a shower of debris into a crowd and killing at least eight people.

25.   A Pakistan air force plane slammed into a crowded Karachi neighborhood Thursday, killing at least six people on the ground.

26.   A plane also slammed into the Defense Department, raising fears that the seat of government itself was under attack.

27.   A small Jordanian plane slammed into the ground at an air show Saturday, killing the pilot and eight spectators as it showered flame and debris into a crowd.

28.   A single-engine plane slammed into a wheat field on the Eastern Shore, injuring the four people from New Jersey aboard, state police said.

29.   A small plane slammed into the ground at an air show Saturday sending a deadly shower of debris into the crowd and killing at least eight people.

30.   A small plane slammed into the side of a canyon outside Ensenada in northern Mexico Tuesday, killing six Baja California state officials and two pilots.