With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The September 11 attacks were carried out by toddlers.
text_B: The September 11 attacks -LRB- also referred to as 9 / 11 -RRB- The expression `` 9 / 11 '' is pronounced `` nine eleven '' .. The slash is not part of the pronunciation .. slash. Slash ( punctuation ). The name is frequently used in British English as well as in American English , even though the dating conventions differ .. dating conventions. Date format by country. were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda on the United States on the morning of Tuesday , September 11 , 2001 .. al-Qaeda. al-Qaeda. terrorist attacks. Terrorism. Islamic terrorist. Islamic terrorism. United States. United States. The attacks killed 2,996 people , injured over 6,000 others , and caused at least $ 10 billion in property and infrastructure damage .. Four passenger airliners operated by two major U.S. passenger air carriers -LRB- United Airlines and American Airlines -RRB- -- all of which departed from airports in the northeastern United States bound for California -- were hijacked by 19 al-Qaeda terrorists .. al-Qaeda. al-Qaeda. United States. United States. air carriers. Airline. United Airlines. United Airlines. American Airlines. American Airlines. northeastern United States. northeastern United States. California. California. hijacked. Aircraft hijacking. 19 al-Qaeda terrorists. Hijackers in the September 11 attacks. Two of the planes , American Airlines Flight 11 and United Airlines Flight 175 , were crashed into the North and South towers , respectively , of the World Trade Center complex in New York City .. World Trade Center. World Trade Center ( 1973–2001 ). Flight 175. United Airlines Flight 175. New York City. New York City. New York. New York ( state ). United Airlines. United Airlines. American Airlines. American Airlines. American Airlines Flight 11. American Airlines Flight 11. United Airlines Flight 175. United Airlines Flight 175. North. One World Trade Center#Original building ( 1970–2001 ). South towers. Two World Trade Center#Original building ( 1971–2001 ). Within an hour and 42 minutes , both 110-story towers collapsed , with debris and the resulting fires causing partial or complete collapse of all other buildings in the World Trade Center complex , including the 47-story 7 World Trade Center tower , as well as significant damage to ten other large surrounding structures .. World Trade Center. World Trade Center ( 1973–2001 ). towers collapsed. Collapse of the World Trade Center. 7 World Trade Center. 7 World Trade Center. A third plane , American Airlines Flight 77 , was crashed into the Pentagon -LRB- the headquarters of the United States Department of Defense -RRB- in Arlington County , Virginia , leading to a partial collapse of the building 's western side .. the Pentagon. the Pentagon. Flight 77. American Airlines Flight 77. United States. United States. American Airlines. American Airlines. American Airlines Flight 77. American Airlines Flight 77. United States Department of Defense. United States Department of Defense. The fourth plane , United Airlines Flight 93 , initially was steered toward Washington , D.C. , but crashed into a field in Stonycreek Township near Shanksville , Pennsylvania , after its passengers tried to overcome the hijackers .. Flight 93. United Airlines Flight 93. Stonycreek Township. Stonycreek Township, Somerset County, Pennsylvania. hijackers. Hijackers in the September 11 attacks. United Airlines. United Airlines. United Airlines Flight 93. United Airlines Flight 93. It was the deadliest incident for firefighters and law enforcement officers in the history of the United States , with 343 and 72 killed respectively .. United States. United States. deadliest incident for firefighters. List of the deadliest firefighter disasters in the United States. law enforcement officers. List of American police officers killed in the line of duty. history of the United States. history of the United States. law enforcement. Law enforcement agency. Suspicion for the attack quickly fell on al-Qaeda .. al-Qaeda. al-Qaeda. The United States responded to the attacks by launching the War on Terror and invading Afghanistan to depose the Taliban , which had harbored al-Qaeda .. al-Qaeda. al-Qaeda. United States. United States. War on Terror. War on Terror. invading Afghanistan. War in Afghanistan ( 2001–2014 ). Taliban. Taliban. Many countries strengthened their anti-terrorism legislation and expanded the powers of law enforcement and intelligence agencies to prevent terrorist attacks .. terrorist attacks. Terrorism. anti-terrorism legislation. anti-terrorism legislation. law enforcement. Law enforcement agency. intelligence agencies. Intelligence agency. Although al-Qaeda 's leader , Osama bin Laden , initially denied any involvement , in 2004 he claimed responsibility for the attacks .. al-Qaeda. al-Qaeda. responsibility. Responsibility for the September 11 attacks. Osama bin Laden. Osama bin Laden. responsibility for the attacks. Responsibility for the September 11 attacks. Al-Qaeda and bin Laden cited U.S. support of Israel , the presence of U.S. troops in Saudi Arabia , and sanctions against Iraq as motives .. U.S. support of Israel. Israel–United States relations. U.S. troops in Saudi Arabia. Operation Southern Watch. sanctions against Iraq. Iraq sanctions. Having evaded capture for almost a decade , bin Laden was located and killed by SEAL Team Six of the U.S. Navy in May 2011 .. bin Laden was located and killed. Death of Osama bin Laden. SEAL Team Six. SEAL Team Six. U.S. Navy. U.S. Navy. The destruction of the World Trade Center and nearby infrastructure caused serious damage to the economy of Lower Manhattan and had a significant effect on global markets , closing Wall Street until September 17 and the civilian airspace in the U.S. and Canada until September 13 .. World Trade Center. World Trade Center ( 1973–2001 ). Lower Manhattan. Lower Manhattan. Wall Street. Wall Street. Many closings , evacuations , and cancellations followed , out of respect or fear of further attacks .. Cleanup of the World Trade Center site was completed in May 2002 , and the Pentagon was repaired within a year .. World Trade Center. World Trade Center ( 1973–2001 ). the Pentagon. the Pentagon. World Trade Center site. World Trade Center site. On November 18 , 2006 , construction of One World Trade Center began at the World Trade Center site .. World Trade Center. World Trade Center ( 1973–2001 ). World Trade Center site. World Trade Center site. construction. Construction of One World Trade Center. One World Trade Center. One World Trade Center. The building was officially opened on November 3 , 2014 .. Numerous memorials have been constructed , including the National September 11 Memorial & Museum in New York City , the Pentagon Memorial in Arlington County , Virginia , and the Flight 93 National Memorial in a field in Stonycreek Township near Shanksville , Pennsylvania .. the Pentagon. the Pentagon. Flight 93. United Airlines Flight 93. New York City. New York City. New York. New York ( state ). Stonycreek Township. Stonycreek Township, Somerset County, Pennsylvania. memorials. Memorials and services for the September 11 attacks. National September 11 Memorial & Museum. National September 11 Memorial & Museum. Pentagon Memorial. Pentagon Memorial. Flight 93 National Memorial. Flight 93 National Memorial
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