Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Opposition Urges 'Russia Without Putin' in Rally for Slain Liberal Agence France-Presse MOSCOW - Thousands rallied in central Moscow on Saturday to call on President Vladimir Putin not to stay in power indefinitely, in the first major protest by the Russian opposition since the Kremlin chief announced controversial plans to change the constitution. The rally marked five years since the assassination of opposition politician Boris Nemtsov, but its organizers also wantedthe event to send a message to Putin after he proposed major constitutional changes. Organizers, including the country's most prominent opposition leader,Alexei Navalny, called for a mass turnout to show Putin that he must not consider staying in power by any means when his current mandate ends in 2024. Moscow authorities gave permissionforthe rally--after a succession of demonstrations urging fair elections last summer were roughly dispersed--and the street was packed by a flow of protesters, an AFP correspondent said. "The Putin regime is a threat to humankind," said the slogan on one placard next to a portrait of Nemtsov. "Putin's policies are based on total lies," said another, quoting the liberal politician who was assassinated in central Moscow on February 27, 2015. "Russia without Putin!" the crowds chanted repeatedly as they marched. The White Counter monitor,which counts attendance at protests,said 22,300 people took part in the march. TheInteriorMinistry said 10,500 took part. Constitutional overhaul Putin, who has dominated Russia for two decades, in January unleashed a political storm, proposing an overhaul of the constitution, the first changes to the basic law since 1993. .