Brazil's defense minister says his country's air-traffic control system is one of the world's best.
Waldir Pires spoke at a congressional hearing Wednesday on Brazil's six-month aviation crisis.
Last month Brazil's airports were shut down when air traffic controllers staged a one-day strike to demand better working conditions. Controllers also complained that they have to use faulty equipment.
Brazilian military officials say controllers were partly to blame for a mid-air collision last September between a passenger aircraft and a private jet that killed 154 people.
Some information for this report was provided by AP and Reuters.
