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?

<P0-S0> 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. <P0-S1> 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. <P0-S2> He was then held at multiple CIA secret prisons and Guantanamo Bay where he was interrogated and tortured with methods including waterboarding. <P0-S3> 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". <P0-S4> 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. <SEP> <P1-S0> 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. <P1-S1> it has been adopted primarily as a response to the september 11, 2001 attacks on the united states. <P1-S2> since 2001, terrorist motivated attacks upon service members have occurred in arkansas and texas. <SEP> <P2-S0> 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. <P2-S1> A large portion of these tornadoes form in an area of the central United States popularly known as Tornado Alley. <P2-S2> 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. <P2-S3> The United States has the most tornadoes of any country, as well as the strongest and most violent tornadoes. <SEP> <P3-S0> other critics, such as francis fukuyama, note that "terrorism" is not an enemy, but a tactic; calling it a "war on terror", obscures differences between conflicts such as anti-occupation insurgents and international mujahideen. <P3-S1> with a military presence in iraq and afghanistan and its associated collateral damage shirley williams maintains this increases resentment and terrorist threats against the west. <P3-S2> there is also perceived u.s. hypocrisy, media-induced hysteria, and that differences in foreign and security policy have damaged america's image in most of the world. <SEP> <P4-S0> 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. <P4-S1> of Muslim faith. <P4-S2> The word crusade was not used again. <P4-S3> It will not end until every terrorist group of global reach has been found, stopped, and defeated." <P4-S4> 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.