low of 2.58% in interest rates to 1.98% per annum, generating a savings of 1 billion dollars in 25 years. Sweden rejected the application and signing the contract is seriously threatened with limit until October 2015. On July 29, 2015, the Brazilian government confirmed that it had reached an agreement with Sweden to finance the purchase of a batch of 36 Gripen NG. In September 2015 Brazil finalized the US$4.68 billion purchase of 36 Saab Gripen E fighters to be delivered between 2019 and 2024. An assembly line is being established in Brazil to build 15 of the aircraft with engineers and technicians from Brazil traveling to Sweden to begin training. Saab officials have said they believe this is just an initial order, with potential for additional sales to other Latin American countries. Helicopter aerial refueling In November 2020 the Brazilian Air Force (FAB), through a technical and multidisciplinary team coordinated by the Department of Aerospace Science and Technology, concluded, on October 30, in Rio de Janeiro, the last phase of the inflight refueling tests campaign between the H-36 Caracal helicopter and the KC-130 Hercules aircraft. The flights took place in a restricted area under military control, on the coast of Rio de Janeiro, where the refueling aircraft KC-130 Hercules of the Squadron Gordo ( “fat”, 1st / 1st GT) and H-36 Caracal helicopters from squadrons Falcão ( “Falcon” 1st / 8th GAV) and Puma (3rd / 8th GAV) met to perform the REVO procedure. The Campaign aimed to complete the tasks foreseen in the certification process, including the unprecedented steps of transferring fuel from the KC-130 to the H-36 and the simultaneous refueling of two helicopters. As a result, Brazil becomes the first country in South America with the ability to refuel helicopters in flight, a historic landmark for Brazilian Air Force and Brazil. Datalink The Link-BR2 is a datalink developed by the Air Force and the Brazilian defence company AEL Sistemas, this technology allow the exchange of data such radar information, videos and images with other units of the three branches anytime and anywhere, using an advanced encrypted protocol with a high degree of security. Structure The Brazilian Air Force is the aerospace branch of the Brazilian armed forces and is managed by the "Aeronautics Command" (). The COMAER was created in 1999 and is assigned as service branch of the Armed Forces as part of the Ministry