Tens of thousands of people descended on Moscow in an effort to show Russian President Vladimir Putin his critics will not be silenced.
Tens of Thousands Protest in Moscow

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A view of one of the rooms in Alexei Navalny's flat, after a police search. Russian investigators searched the apartments of several protest leaders Monday and called them in for questioning Tuesday.

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People take part in an oath-taking before the statues of late North Korean leaders Kim Il-sung and Kim Jong-il on Mansudae Hill in Pyongyang, April 10, 2013. (KCNA)

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Participants at the anti-government protest in Moscow.

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Participants march with flags and placards in Moscow.