Aero Rent (Moscow Vnukovo) as well as Airstars (PL/Moscow Domodedovo), Aviaenergo (7U/Moscow Sheremetyevo), Avial NV (NVI/Moscow Domodedovo), Avis-Amur (Khabarovsk), Dauria (Chita), Lukiaviatrans (LKV/Pskov), Novosibirsk Air Enterprise (NBE/Novosibirsk), Rusair (CGI/Moscow Sheremetyevo), Ryazanaviatrans (RYZ/Ryazan), Ulyanovsk Higher Aviation School (UHS/Ulyanovsk) and Yak Service (AKY/Moscow Vnukovo) have all had their operating licenses withdrawn in the second half of 2011 by the Russian civil aviation authorities as a result of a lack of financial or safety issues as part of a government crackdown on what it considered unsafe or financially unstable airlines. The most prominent victims of these efforts were KMV - Kavkazskie Mineralnye Vody (KV/Mineralnye Vody) and South East Airlines (N2/Makhachkala). Some smaller operators not mentioned in the list above also have lost their air operator certificates.