Security in Colombia has improved significantly over recent years, most notably in large urban centers. Terrorist attacks and powerful narco-criminal group operations pose a threat to commercial activity and investment in some rural zones where government control is weak. In 2016, Colombia signed a peace agreement with the FARC to end half a century of confrontation. Congressional approval of that peace accord put in motion a disarmament, demobilization, and reintegration process, which granted the FARC status as a legal political organization and took over 13,000 combatants off the battlefield. Currently the peace negotiations with the National Liberation Army (ELN), which began in 2017, are suspended. This terrorist group continues a low-cost, high-impact asymmetric insurgency, including an attack on the Colombian police academy in 2019 that killed 22 cadets. The ELN often focuses attacks on oil pipelines, mines, roads, and electricity towers to disrupt economic activity and pressure the government. The ELN also extorts businesses in their areas of operation, kidnaps personnel, and destroys property of entities that refuse to pay for protection.