Black Widow (, chyornaya vdova) or Shahidka (—Russian feminine gender derivation from shahid), is a term for Islamist Chechen female suicide bombers, willing to be a manifestation of violent jihad. They became known at the Moscow theater hostage crisis of October 2002. The commander Shamil Basayev referred to the shahidkas as a part of force of his suicide bombers called the Riyad-us Saliheen Brigade of Martyrs. Basayev also stated that he himself trained at least fifty of the Black Widows. The female suicide bombers have carried out over 65% of the 23 terrorist attacks linked to the Chechen movement since 2000. The Black Widows are associated with terrorist attacks in Chechnya between 1999 and 2005. The term "Black Widows" probably originates from these women being widows of men killed by the Russian forces in Chechnya (the connotation of black widow spider is intended). The Black Widows wear black dresses and dark clothing that covers their bodies from head to toe. This attire is supposed to symbolize their personal losses from the Chechen wars. In 2003, the Russian journalist Yulia Yuzik coined the phrase "Brides of Allah" (Невесты Аллаха) when she described the process by which Chechen women were recruited by Basayev and his associates; the phrase was also used again after the Beslan attack, as the title of an installment of the Russian NTV programme Top Secret (Совершенно секретно). Furthermore, to terrorists, Black Widows are considered less valuable than male terrorists, since male terrorists require formal training, while women terrorists are viewed as expendable. In some cases, when opinions do not match between Black Widows and male terrorists, male terrorists detonate bombs strapped onto Black Widows to get rid of them. Additionally, women terrorists are strategically appealing because they symbolize opposing their traditional roles of being obedient, also women terrorists arouse less suspicion, which terrorists groups are able to take advantages of. Between 1998 and 2001, according to professor Richard Pape of University of Chicago, the average number of deaths caused by a suicide attack is 13 people, while the average deaths caused by suicide attacks from Black Widows is 28, meaning they are twice more deadly than the average suicide bomber. There are currently forty-seven Chechen Female bombers that have been confirmed based on twenty five successful bombings. These attacks methods include detonating bombs on trucks, cars, usage of explosive devices, or using suicide belts or bags. Some have