U.S. President Joe Biden, right, meets with Indian Prime Minister Narendra Modi during the Quad leaders summit at Kantei Palace, Tuesday, May 24, 2022, in Tokyo.

Video. World faces 'dark hour', says Biden as Modi stays silent on Russia

The US president urged a greater effort to stop Putin's aggression. “It's a global issue,” he told the “Quad” summit with Japan, Australia and India.