Question: What is the biggest terrorist attack on the country with the most millionaires, by the Islamic group that Bush said the 'war on terror' began with?

<P0-S0> the attack on prekaz, also known as the prekaz massacre, was an operation led by the special anti-terrorism unit of serbia on 5 march 1998, to capture kosovo liberation army (kla) fighters deemed terrorists by serbia. <P0-S1> during the operation, kla leader adem jashari and his brother hamëz were killed, along with nearly 60 other family members. <P0-S2> the attack was criticized by amnesty international, which wrote in its report that: "all evidence suggests that the attack was not intended to apprehend armed albanians, but 'to eliminate the suspects and their families.'" <P0-S3> serbia, on the other hand, claimed the raid was due to kla attacks on police outposts. <SEP> <P1-S0> At the end of 2017, there were estimated to be just over 15 million US $millionaires or high - net - worth individual (HNWIs) in the world. <P1-S1> The United States had the highest number of HNWIs (5,047,000) of any country, while New York had the most HNWIs (393,500) among cities. <SEP> <P2-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. <P2-S1> 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". <P2-S2> 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. <P2-S3> He was then held at multiple CIA secret prisons and Guantanamo Bay where he was interrogated and tortured with methods including waterboarding. <P2-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> <P3-S0> the obama administration began to reengage in iraq with a series of airstrikes aimed at isis beginning on 10 august 2014. on 9 september 2014 president obama said that he had the authority he needed to take action to destroy the militant group known as the islamic state of iraq and the levant, citing the 2001 authorization for use of military force against terrorists, and thus did not require additional approval from congress. <P3-S1> the following day on 10 september 2014 president barack obama made a televised speech about isil, which he stated "our objective is clear: we will degrade, and ultimately destroy, isil through a comprehensive and sustained counter-terrorism strategy". <P3-S2> obama has authorized the deployment of additional u.s. forces into iraq, as well as authorizing direct military operations against isil within syria. <P3-S3> on the night of 21/22 september the united states, saudi arabia, bahrain, the uae, jordan and qatar started air attacks against isis in syria. <P3-S4> [citation needed] <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> 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. <P4-S4> It will not end until every terrorist group of global reach has been found, stopped, and defeated."