 Complete the following phrase:  The Shahidka, commonly called the Black widows are a group of Islamist Chechen separatist suicide bombers. Khava Barayeva blew herself up at a Russian Army outpost on June 7, 2000. In 2001, Aiza Gazuyeva killed Russian general Gaidar Gadzhiyev in a suicide bombing, the first female suicide bomber of the Chechen insurgency. The group carried out the 