Israeli military offensives in Gaza have usually led to spikes in Palestinian civilian casualties.
Pussy Riot's protest demands included: "Let all political prisoners free."
Tens of thousands of people took to the streets to tell Donald Trump he was not welcome in London.
Ivanka Trump faced further attacks over the Trump administration's separation of migrant families.
"Our protest will be loud, fun, multicultural and bring people together," said protest organizers in response.
"Moral outrage is water off a duck's back to Trump," a petition for Trump Baby said. "But he really seems to hate it when people make fun of him."
A drop in Putin's popularity comes at a time when Russian dissatisfaction in state polls is gradually building.
The 17-year-old was shot three times running from a traffic stop.
Thousands of people in at least 30 different cities in the U.S. and beyond are expected on Friday to protest the Trump administration's "zero tolerance" policy on families caught entering the U.S. illegally.
The uniformed vigilantes who attacked anti-Kremlin protesters were not police officers but did not arouse the suspicion of authorities.
The Islamic month of Ramadan arrived the same day as the annual Nakba remembrance and a day after the deadliest day in Gaza since 2014.
The head of Russia's security council blamed a wide range of groups for implanting "destructive views" in the minds of the youth.
A White House spokesman told skeptical reporters that blaming Israel for Palestinian deaths was "a propaganda attempt" by Hamas.
Jason Kessler, one of the organizers of last year's rally, applied for a permit for a second event to take place on its anniversary in August 2018.
A brief fight between two inmates and two Louisiana State Penitentiary guards spilled over into an ongoing prison strike Wednesday.
The incident was filmed in a video that later went viral.
Hundreds of people were arrested across Russia as Putin prepares for an unprecedented fourth term.
The organizers are rallying against policies including the transgender military ban.
May Day became known as International Workers' Day in the 19th century.