Nobody knows.
Terror attacks have been taking place for hundreds of years. From the crusades in Jerusalem, the Kamikazes in the second world war up to modern times.
Many terror attacks or attempted terror attacks aren't even officially recorded, due to national and global defence reasons.
2001 Sept. 11, New York City, Arlington, Va., and Shanksville, Pa.: hijackers crashed 2 commercial jets into twin towers of World Trade Center; 2 more hijacked jets were crashed into the Pentagon and a field in rural Pa. Total dead and missing numbered 2,9921: 2,749 in New York City, 184 at the Pentagon, 40 in Pa., and 19 hijackers. Islamic al-Qaeda terrorist group blamed.
2011 Jan. 17, Spokane, Washington: a pipe bomb is discovered along the route of the Martin Luther King, Jr. memorial march. The bomb, a "viable device" set up to spray marchers with shrapnel and to cause multiple casualties, is defused without any injuries.
172 terrorist attacks have been made since then
There have been many terrorist attacks such as the September 11th attacks and the 67 terrorist attacks on Pakistan,The Mumbai attacks and many more
Through its history, and particularly between the troubles that ran from the late 1960s to the late 1990s, there have been many terrorist attacks in Northern Ireland, though it is not a problem in modern times.
At the moment, yes. There have been terrorist attacks in recent years, as there have been in many countries of the world.
well there have been multiple but if you mean the 9/11 terrorist attacks, it was 2001
Too many people die from the result of a terrorist attacks
Many people think that the terrorist attacks on the twin towers was fixed. It was not. The attacks were a random act that was plotted and instrumented by terrorists that do not like America.
Damascus terrorist attacks happened in 2008.
No. Terrorist attacks are man-made disasters, deliberately caused by humans.
A lot because they are worried about terrorist attacks
2,993, including the terrorists.
the terrorist attack because they were mad at the homeland security...
The twin towers attack on 9/11