The brother of a U.S. citizen arrested in Russia on espionage charges said Tuesday that he's innocent and was in Moscow to attend a wedding. Paul Whelan, a retired Marine, was arrested in Moscow on Friday. The Russian Federal Security Service, in announcing the arrest three days later, said Whelan was caught "during an espionage operation," but gave no details. "We are deeply concerned for his safety and well-being," his brother, David Whelan, said in a statement posted on Twitter. "His innocence is undoubted and we trust that his rights will be respected." The Russian spying charges carry a prison...