El Salvador has deployed more than 500 special forces to Haiti, bolstering the UN-sanctioned Gang Suppression Force (GSF) after gangs kidnapped 4 Salvadoran aviation technicians on October 18. US C-130Js are transporting Salvadoran reinforcements, including Yago light armored vehicles with an MRAP seen ready for delivery. The US previously donated 2 AH-1N helicopters to El Salvador for its medical evacuation mission in Haiti. Bukaki threatened a much larger attack unless the 4 missing technicians were returned alive. Their condition is unknown. The GSF still has only about 2,000 of its 5,500 authorized personnel deployed, while gangs control about 90 percent of Port-au-Prince.