Asserting that the world is not witnessing a global gridlock, US Secretary of State John Kerry on Friday said the fight against violent extremism is the "challenge of our generation".

The deployment of autonomous weapons would represent a dangerous new era in warfare, scientists said.

Reducing commercial friction and investment uncertainty are among the measures that can boost global trade as well as help reintegrate the world's "spaghetti bowl" of regional free trade and investment agreements, says a report.