Question: Who is the mother of Tsarevich Ivan Ivanovich, of the country where the operator of 81-740/741 was bombed in August 2004?

<P0-S0> the oklahoma city bombing was a domestic terrorist truck bombing on the alfred p. murrah federal building in downtown oklahoma city, oklahoma, united states on april 19, 1995. perpetrated by timothy mcveigh and terry nichols, the bombing happened at 9: 02am and killed at least 168 people, injured more than 680 others, and destroyed one - third of the building. <P0-S1> the blast destroyed or damaged 324 other buildings within a 16 - block radius, shattered glass in 258 nearby buildings, and destroyed or burned 86 cars, causing an estimated $652 million worth of damage. <P0-S2> extensive rescue efforts were undertaken by local, state, federal, and worldwide agencies in the wake of the bombing, and substantial donations were received from across the country. <P0-S3> the federal emergency management agency (fema) activated 11 of its urban search and rescue task forces, consisting of 665 rescue workers who assisted in rescue and recovery operations. <P0-S4> until the september 11 attacks in 2001, the oklahoma city bombing was the deadliest terrorist attack in the history of the united states, and remains the deadliest incident of domestic terrorism in the country's history. <SEP> <P1-S0> He was the third child and first son of the couple and died in infancy. <P1-S1> Dmitri Ivanovich (; 11 October 155226 June 1553) was the first Tsarevich or Tsesarevich - the heir apparent - of the Tsardom of Russia, as the eldest son of Ivan the Terrible, or "Ivan IV of Russia" and his first Tsaritsa, Anastasia Romanovna. <SEP> <P2-S0> the enola gay (/ ɪˈnoʊlə ˈɡeɪ /) is a boeing b - 29 superfortress bomber, named for enola gay tibbets, the mother of the pilot, colonel paul tibbets, who selected the aircraft while it was still on the assembly line. <P2-S1> on 6 august 1945, during the final stages of world war ii, it became the first aircraft to drop an atomic bomb. <P2-S2> the bomb, code - named ``little boy '', was targeted at the city of hiroshima, japan, and caused unprecedented destruction. <P2-S3> enola gay participated in the second atomic attack as the weather reconnaissance aircraft for the primary target of kokura. <P2-S4> clouds and drifting smoke resulted in a secondary target, nagasaki, being bombed instead. <SEP> <P3-S0> The official investigation concluded that it was organized by the same group as the February 2004 Moscow metro bombing, as well as two previous terrorist attacks on bus stops in Voronezh, southern Russia, in 2004. <P3-S1> The deaths included the bomber and her accomplice, Nikolay Kipkeev (Kipkeyev), the head of an Islamic militant group Karachay Jamaat from the republic of Karachay–Cherkessia, as the bomb apparently exploded prematurely while the two were standing in the entrance hall of the metro station. <SEP> <P4-S0> 81-740/741 (Rusich, ), is a type of rolling stock specially designed for running under the harsh winter climate of outdoor Moscow. <P4-S1> They are currently assigned to the metro lines including Arbatsko-Pokrovskaya Line, Filyovskaya Line, Koltsevaya Line and Butovskaya Line of Moscow Metro, and all lines of the Sofia Metro in Bulgaria. <P4-S2> Rusich also features a corridor connection, allowing passenger access between two contiguous cars.