Madame Tussauds entity ceased to exist. On 17 July 2007, as part of the financing for the Tussauds deal, Merlin sold the freehold of Madame Tussauds to private investor Nick Leslau and his investment firm Prestbury under a sale and leaseback agreement. Although the attraction sites are owned by Prestbury, they are operated by Merlin based on a renewable 35-year lease. Madame Tussaud's wax museum became a major tourist attraction in London, incorporating (until 2010) the London Planetarium in its west wing and a large animated dark ride, "The Spirit of London", opened in 1993. Today's wax figures at Tussauds include historical
RD-107 simultaneous consumption of propellant mass among the four R-7 boosters. The RD-107 and RD-108 engines are produced at the JSC Kuznetsov plant in Samara, Russia, under the supervision of the Privolzhskiy branch of NPO Energomash, also known as the Volga branch. The Privolzhsky branch was organized as a branch of OKB-456 in 1958, specifically for the manufacture of RD-107 and RD-108 engines. The branch was led by Y.D. Solovjev until 1960, then by R.I. Zelenev until 1975, then by A.F. Udalov until 1978, and is currently led by A.A. Ganin. Modifications to the RD-107 design have led to production of