For years, Umarov had been the top terrorist leader in Russia, and taken responsibility for several attacks on civilian targets since 2009, including the 2010 Moscow Metro bombings and the 2011 Domodedovo International Airport bombing.
Umarov had been the top terrorist leader in Russia. This was for years. Umarov had taken responsibility for several attacks on civilian targets since 2009. This was for years. This was including the 2010 Moscow Metro bombings. This was including the 2011 Domodedovo International Airport bombing.