King Hussein's eldest son; the King had appointed his younger brother, Abdullah's uncle, Prince Hassan, as heir designate in 1965. Shortly before his death on 7 February 1999, the King replaced Hassan with Abdullah. When Abdullah became king, he named his younger half-brother, Prince Hamzah, as heir designate on his accession. On 28 November 2004, King Abdullah removed Hamzah from his title as crown prince. Though the title of crown prince was left vacant, the Constitution of Jordan provides for agnatic primogeniture, meaning the monarch's eldest son is automatically first in the line of succession to the Jordanian throne unless decreed otherwise. Hussein thus became heir apparent as soon as his half-uncle lost the status, and analysts widely expected the King to bestow the formal title on Hussein. The title was conferred on 2 July 2009, when a royal decree naming him as crown prince, effective immediately, was issued. Official duties Unlike the King's, the Crown Prince's role is mostly ceremonial under the Constitution, and the title is not associated with any political post. Hussein performed his first official engagement in June 2010, when he represented his father at the celebrations of the anniversary of the Arab Revolt and the Armed Forces Day. Hussein has served his father on both official and military missions, and has served several times as regent during the King's absence from the country. Hussein is in charge of the Crown Prince Foundation, which is responsible for a technical university, and a number of scientific and humanitarian initiatives. The foundation established the Haqiq initiative, which aims to encourage youth for volunteerism; a NASA internship program; MASAR initiative to encourage space technology innovation; and the Hearing Without Borders initiative that funds cochlear implants for Jordanians with impaired hearing. The interns from the NASA program built a cubesat (mini satellite) named JY1, Jordan's first satellite which launched from California in 2018. The cubesat project was named after the late King Hussein's amateur radio callsign. In 2013, Hussein participated in a training session with the members of the Jordanian special forces elite 71st Counter Terrorism Battalion. On 14 July 2014, Hussein visited the King Hussein Medical Center in Amman where injured Palestinians who fled Gaza were receiving medical treatment. On 23 April 2015, the then-20-year-old Prince Hussein became the youngest person ever to chair a UN Security Council session. During the meeting, the prince oversaw a debate about methods