Thousands of workers mobilized by powerful trade unions converged outside Argentina’s Congress, blocking traffic and clashing with police, as senators opened debate on a sweeping overhaul of the nation’s rigid labor laws. Security forces fired water cannons and rubber bullets to control the crowds as some protesters lobbed rocks and Molotov cocktails. ___ This gallery was curated by AP photo editors. AP photography: https://apnews.com/photography Instagram: https://www.instagram.com/apnews