Question: what is the biggest terrorist attack on the country that has the most tornadoes by the group that Bush said the war on terror begins with?

full_context: Document 1: September 11 attacks: Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002 Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh. The 9/11 Commission Report determined that the animosity towards the United States felt by Mohammed, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel". Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay where he was interrogated and tortured with methods including waterboarding. During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.
Document 2: 2004 United States presidential election: Just eight months into his presidency, the terrorist attacks of September 11, 2001 suddenly transformed Bush into a wartime president. Bush's approval ratings surged to near 90%. Within a month, the forces of a coalition led by the United States entered Afghanistan, which had been sheltering Osama bin Laden, suspected mastermind of the September 11 attacks. By December, the Taliban had been removed as rulers of Kabul, although a long and ongoing reconstruction would follow, severely hampered by ongoing turmoil and violence within the country.
Document 3: United States–Yemen relations: In the years after the September 11, 2001 attack on the World Trade Center in New York City, Yemen became a key site for U.S. intelligence gathering and drone attacks on Al-Qaeda. According to the 2012 U.S. Global Leadership Report, 18% of Yemenis approved of U.S. leadership, with 59% disapproving and 23% uncertain. According to a February 2015 report from the Congressional Research Service, U.S. officials considered Al-Qaeda in the Arab Peninsula the Al-Qaeda affiliate "most likely to attempt transnational attacks against the United States."
Document 4: Military history of the United States: The War on Terrorism is a global effort by the governments of several countries (primarily the United States and its principal allies) to neutralize international terrorist groups (primarily Islamic Extremist terrorist groups, including al-Qaeda) and ensure that countries considered by the US and some of its allies to be Rogue Nations no longer support terrorist activities. It has been adopted primarily as a response to the September 11, 2001 attacks on the United States. Since 2001, terrorist motivated attacks upon service members have occurred in Arkansas and Texas.
Document 5: Tornadoes in the United States: Tornadoes are more common in United States than in any other country. The United States receives more than 1,200 tornadoes annually -- four times the amount seen in Europe. Violent tornadoes -- those rated EF4 or EF5 on the Enhanced Fujita Scale -- occur more often in the United States than in any other country.
Document 6: Tornadoes in the United States: Most tornadoes in the United States occur east of the Rocky Mountains. The Great Plains, the Midwest, the Mississippi Valley and the southern United States are all areas that are vulnerable to tornadoes. They are relatively rare west of the Rockies and are also less frequent in the northeastern states. Tornado Alley is a colloquial term for an area particularly prone to tornadoes. There is no officially defined 'Tornado Alley' -- at its broadest this area stretches from North Texas to Canada with its core centered on Oklahoma, Kansas and northern Texas. Another highly significant region -- colloquially known as Dixie Alley -- is the southern United States and particularly the northern and central parts of Alabama and Mississippi. Florida is one of the most tornado prone states. However, Florida tornadoes only rarely approach the strength of those that occur elsewhere.
Document 7: Tornado climatology: Tornadoes have been recorded on all continents except Antarctica and are most common in the middle latitudes where conditions are often favorable for convective storm development. The United States has the most tornadoes of any country, as well as the strongest and most violent tornadoes. A large portion of these tornadoes form in an area of the central United States popularly known as Tornado Alley. Other areas of the world that have frequent tornadoes include significant portions of Europe, South Africa, Philippines, Bangladesh, parts of Argentina, Uruguay, and southern and southeast Brazil, northern Mexico, New Zealand, and far eastern Asia.
Document 8: Mamdouh Habib: Arrested after the 9/11 attacks in 2001 during a trip to Pakistan and Afghanistan, Habib was interrogated there by Pakistani and United States CIA agents before being shipped by extraordinary rendition to Egypt, where he was held for six months and interrogated more under torture. The CIA transferred him back to a black site in Afghanistan for more torture and interrogation, then to US military custody. In 2002 Habib was transferred to the Guantanamo Bay detention camp. He continued to be held without charges and suffered coercive interrogation.
Document 9: Tornado climatology: The United States has the most tornadoes of any country. Many of these form in an area of the central (with some definitions including Southern) United States known as Tornado Alley. This area extends into Canada, particularly the Prairie Provinces and Ontario; however, activity in Canada is less frequent and intense than that of the US. The high frequency of tornadoes in North America is largely due to geography, as moisture from the Gulf of Mexico is easily advected into the midcontinent with few topographic barriers in the way. The Rocky Mountains block Pacific - sourced moisture and buckle the atmospheric flow, forcing drier air at mid-levels of the troposphere due to downsloping winds and causing cyclogenesis downstream to the east of the mountains. Downsloping winds off the Rockies force the formation of a dry line when the flow aloft is strong, while the Gulf of Mexico fuels abundant low - level moisture. This unique topography allows for frequent collisions of warm and cold air, the conditions that breed strong, long - lived storms throughout the year. This area extends into Canada, particularly Ontario and the Prairie Provinces, and strong tornadoes can also occur in northern Mexico.
Document 10: Tornado climatology: Tornadoes have been recorded on all continents except Antarctica and are most common in the middle latitudes where conditions are often favorable for convective storm development. The United States has the most tornadoes of any country, as well as the strongest and most violent tornadoes. A large portion of these tornadoes form in an area of the central United States popularly known as Tornado Alley. Other areas of the world that have frequent tornadoes include significant portions of Europe, South Africa, Philippines, Bangladesh, parts of Argentina, Uruguay, and southern and southeast Brazil, New Zealand, and far eastern Asia.
Document 11: War on Terror: In a 'Letter to American People' written by Osama bin Laden in 2002, he stated that one of the reasons he was fighting America is because of its support of India on the Kashmir issue. While on a trip to Delhi in 2002, U.S. Secretary of Defense Donald Rumsfeld suggested that Al-Qaeda was active in Kashmir, though he did not have any hard evidence. An investigation in 2002 unearthed evidence that Al-Qaeda and its affiliates were prospering in Pakistan-administered Kashmir with tacit approval of Pakistan's National Intelligence agency Inter-Services Intelligence. A team of Special Air Service and Delta Force was sent into Indian-administered Kashmir in 2002 to hunt for Osama bin Laden after reports that he was being sheltered by the Kashmiri militant group Harkat-ul-Mujahideen. U.S. officials believed that Al-Qaeda was helping organize a campaign of terror in Kashmir in order to provoke conflict between India and Pakistan. Fazlur Rehman Khalil, the leader of the Harkat-ul-Mujahideen, signed al-Qaeda's 1998 declaration of holy war, which called on Muslims to attack all Americans and their allies. Indian sources claimed that In 2006, Al-Qaeda claimed they had established a wing in Kashmir; this worried the Indian government. India also claimed that Al-Qaeda has strong ties with the Kashmir militant groups Lashkar-e-Taiba and Jaish-e-Mohammed in Pakistan. While on a visit to Pakistan in January 2010, U.S. Defense secretary Robert Gates stated that Al-Qaeda was seeking to destabilize the region and planning to provoke a nuclear war between India and Pakistan.
Document 12: War on Terror: On 12 January 2002, Musharraf gave a speech against Islamic extremism. He unequivocally condemned all acts of terrorism and pledged to combat Islamic extremism and lawlessness within Pakistan itself. He stated that his government was committed to rooting out extremism and made it clear that the banned militant organizations would not be allowed to resurface under any new name. He said, "the recent decision to ban extremist groups promoting militancy was taken in the national interest after thorough consultations. It was not taken under any foreign influence".
Document 13: War on Terror: Because the actions involved in the "war on terrorism" are diffuse, and the criteria for inclusion are unclear, political theorist Richard Jackson has argued that "the 'war on terrorism' therefore, is simultaneously a set of actual practices—wars, covert operations, agencies, and institutions—and an accompanying series of assumptions, beliefs, justifications, and narratives—it is an entire language or discourse." Jackson cites among many examples a statement by John Ashcroft that "the attacks of September 11 drew a bright line of demarcation between the civil and the savage". Administration officials also described "terrorists" as hateful, treacherous, barbarous, mad, twisted, perverted, without faith, parasitical, inhuman, and, most commonly, evil. Americans, in contrast, were described as brave, loving, generous, strong, resourceful, heroic, and respectful of human rights.
Document 14: War on Terror: In 2002, the Musharraf-led government took a firm stand against the jihadi organizations and groups promoting extremism, and arrested Maulana Masood Azhar, head of the Jaish-e-Mohammed, and Hafiz Muhammad Saeed, chief of the Lashkar-e-Taiba, and took dozens of activists into custody. An official ban was imposed on the groups on 12 January. Later that year, the Saudi born Zayn al-Abidn Muhammed Hasayn Abu Zubaydah was arrested by Pakistani officials during a series of joint U.S.-Pakistan raids. Zubaydah is said to have been a high-ranking al-Qaeda official with the title of operations chief and in charge of running al-Qaeda training camps. Other prominent al-Qaeda members were arrested in the following two years, namely Ramzi bin al-Shibh, who is known to have been a financial backer of al-Qaeda operations, and Khalid Sheikh Mohammed, who at the time of his capture was the third highest-ranking official in al-Qaeda and had been directly in charge of the planning for the 11 September attacks.
Document 15: War on Terror: On 16 September 2001, at Camp David, President George W. Bush used the phrase war on terrorism in an unscripted and controversial comment when he said, "This crusade – this war on terrorism – is going to take a while, ... " Bush later apologized for this remark due to the negative connotations the term crusade has to people, e.g. of Muslim faith. The word crusade was not used again. On 20 September 2001, during a televised address to a joint session of congress, Bush stated that, "(o)ur 'war on terror' begins with al-Qaeda, but it does not end there. It will not end until every terrorist group of global reach has been found, stopped, and defeated."
ground_truth: the 9/11 attacks
sub_queries: who gets the most tornadoes in the world Answer: The United States
Where did Bush say the 'war on terror' begins? Answer: with al-Qaeda
what is the biggest terrorist attacks by the Islamic terrorist group with al-Qaeda against #1 Answer: the 9/11 attacks