Passage: Qatar hosts about 10,000 US troops at Al Udeid Air Base, which houses the forward operating base of United States Central Command that plays a commanding role in US airstrikes in Syria, Iraq, and Afghanistan. A Pentagon spokesperson claimed the diplomatic crisis would not affect the US military posture in Qatar.On the 10th and 11 November 2018, the Italian Air Force along with the Qatari Display Team, perform an airshow at the corniche that confirms the bonds of friendship between Italy and Qatar.On 30 January 2018 an inaugural United States-Qatar Strategic Dialogue meeting was held, co-chaired by U.S. Secretary of State Rex Tillerson, U.S. Secretary of Defense Jim Mattis, Qatari Deputy Prime Minister and Minister of State for Defence Affairs Khalid al-Attiyah and Qatari Deputy Prime Minister and Foreign Minister Mohammed bin Abdulrahman Al Thani. The meeting expressed the need for an immediate resolution of the crisis which respects Qatar's sovereignty. In a Joint Declaration on Security Cooperation, the United States expressed its readiness to deter and confront any external threat to Qatar's territorial integrity. Qatar offered to help fund the expansion of facilities at US bases in Qatar.On 25 March 2018, the United States Central Command (CENTCOM) officially denied rumours that the Incirlik Air Base in Turkey and the Al Udeid Air Base in Qatar will be closed due to the ongoing regional conflict.On January 2018, Qatar's ambassador was in talks with Russia with the intent to purchase S-400 surface-to-air missiles. Both countries signed an agreement on military and technical cooperation in 2017. In May 2018, the French daily newspaper Le Monde reported that King Salman of Saudi Arabia would take military action if Qatar installed the Russian air defence system. However, a senior Russian official remarked the system would still be delivered even against the will of Saudi Arabia. The Saudis were themselves approaching Russia to improve economic and military ties in 2017, but talks relating to the arms deal...

Question: Which US base is in Qatar?
Al Udeid Air Base