Joseph Oduro was leading a study group at Brown University Saturday when a man carrying a gun walked into his classroom. He tells ABC News' Whit Johnson about the moment he looked the gunman in the eyes:

This is the moment a bystander tackled an alleged gunman to the ground during the Bondi Beach mass shooting. Footage appears to show a man tackling one of the gunmen before taking his gun and pointing it at him, forcing the alleged attacker to retreat. New South Wales Police have confirmed that 10 people have died in the shooting, including one gunman. The other gunman is in police custody and injured. A further 11 people have been injured in the shooting, two of whom are police officers, accord

Bystander tackles Bondi Beach gunman and snatches weapon from him

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Shooting Incident at Bondi Beach: 9 Dead, Multiple Injured

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