Brazil has launched one of its largest domestic security operations in recent years as Rio de Janeiro hosts the 17th BRICS Summit on 6–7 July. Authorities said about 31,000 personnel—including 21,000 military troops and 19,000 police officers—have been mobilised to protect delegations from the bloc’s 11 member states at the Museum of Modern Art and surrounding venues. The joint command of the armed forces and federal police has deployed 361 vehicles, 38 armoured units, 10 naval vessels, eight helicopters and six anti-drone systems. A 10-kilometre exclusion zone around the summit site has forced the temporary closure of Santos Dumont Airport, while traffic has been rerouted along Avenida Atlântica and other arteries in Copacabana until the event concludes Monday night. Air-defence measures include missile-equipped F-5M fighters—used for the first time in Rio since the 2016 Olympics—and A-29 Super Tucano aircraft. The air force said it intercepted three unauthorised planes that entered the restricted zone over the weekend; all complied with instructions to leave after being escorted. The precautions mirror the security model employed for last year’s G-20 meeting in the city but on a larger scale, underscoring Brazil’s effort to ensure the summit proceeds without incident as it chairs the BRICS grouping for 2025.