(it landed harmlessly in the moat), the Second World War left a greater mark. On 23 September 1940, during the Blitz, high-explosive bombs damaged the castle, destroying several buildings and narrowly missing the White Tower. After the war, the damage was repaired and the Tower of London was reopened to the public. A 1974 bombing in the White Tower Mortar Room left one person dead and 41 injured. No one claimed responsibility for the blast, but the police investigated suspicions that the IRA was behind it. In the 21st century, tourism is the Tower's primary role, with the remaining routine military activities, under the Royal Logistic Corps, having wound down in the latter half of the 20th century and moved out of the castle. However, the Tower is still home to the regimental headquarters of the Royal Regiment of Fusiliers, and the museum dedicated to it and its predecessor, the Royal Fusiliers. Also, a detachment of the unit providing the King's Guard at Buckingham Palace still mounts a guard at the Tower, and with the Yeomen Warders, takes part in the Ceremony of the Keys each day. On several occasions through the year gun salutes are fired from the Tower by the Honourable Artillery Company, these consist of 62 rounds for royal occasions, and 41 on other occasions. Since 1990, the Tower of London has been cared for by an independent charity, Historic Royal Palaces, which receives no funding from the Government or the Crown. In 1988, the Tower of London was added to the UNESCO list of World Heritage Sites, in recognition of its global importance and to help conserve and protect the site. However, recent developments, such as the construction of skyscrapers nearby, have pushed the Tower towards being added to the United Nations' Heritage in Danger List. The remains of the medieval palace have been open to the public since 2006 where visitors can explore the restored chambers. Although the position of Constable of the Tower remains the highest position held at the Tower, the responsibility of day-to-day administration is delegated to the Resident Governor. The Constable is appointed for a five-year term; this is primarily a ceremonial post today but the Constable is also a trustee of Historic Royal Palaces and of the Royal Armouries. General Sir Gordon Messenger was appointed Constable in 2022. At least six ravens are kept at the Tower at all times,