Russian police detained more than 400 people, including opposition politician Alexei Navalny, at a protest in Moscow Wednesday calling for punishment for police officers involved in the alleged framing of a local journalist. Police abruptly dropped drug charges a day earlier against investigative journalist Ivan Golunov, a rare U-turn by the authorities in the face of anger from his supporters who said the charges were bogus and he was targeted over his reporting. Golunov, 36, known for exposing corruption among Moscow city officials, was detained by police last Thursday and accused of dealing drugs, an allegation he denied.