"We're gonna need a bigger gulag…" #BorisNemtsov pic.twitter.com/dKLUCeuDo2

— KGB (@DietKGB) March 1, 2015

Via Mashable:

Tens of thousands of people turned out in central Moscow on Sunday to march in honor of opposition leader and democratic crusader Boris Nemtsov, who was killed by an unknown assailant Friday night.

He was strolling across a bridge over the Moskva River only a few hundred meters from the Kremlin, when shots rang out from the open window of a white car, and four bullets pierced Nemtsov’s back.

On Sunday, he was remembered by young and old, elite and ordinary, across Russia. In Moscow, some 50,000 people, according to organizers, memorialized him in poems and placards deeming him a hero.

“I am Nemtsov”:

Tens of thousands massed in Moscow today to honour murdered opposition leader & former deputy PM Boris #Nemtsov. pic.twitter.com/vOrAstynEN

— Jack Moore (@JFXM) March 1, 2015

#Moscow 50,000 march in memory of Boris #Nemtsov http://t.co/g8ENnKxHdc pic.twitter.com/ee3XnEPKI3

— Newzulu UK (@NewzuluUK) March 1, 2015

More pictures here.