In 2015 it was announced that Interpol now offers a dedicated dark web training program featuring technical information on Tor, cybersecurity and simulated Darknet market takedowns. In October 2013 the UK's National Crime Agency and GCHQ announced the formation of a "Joint Operations Cell" to focus on cybercrime. In November 2015 this team would be tasked with tackling child exploitation on the dark web as well as other cybercrime. In March 2017 the Congressional Research Service released an extensive report on the dark web, noting the changing dynamic of how information is accessed and presented on it; characterized by the unknown, it is of increasing interest to researchers, law enforcement, and policymakers. In August 2017, according to reportage, cybersecurity firms which specialize in monitoring and researching the dark web on behalf of banks and retailers routinely share their findings with the FBI and with other law enforcement agencies "when possible and necessary" regarding illegal content. The Russian-speaking underground offering a crime-as-a-service model is regarded as being particularly robust.