The FBI rounded up a network of deep-cover Russian spies last year after the group came close to placing an agent near a Cabinet official in the Obama administration, a senior FBI counterspy said Monday as the bureau released once-secret documents on the case. ...U.S. officials said it was Secretary of State Hillary Rodham Clinton. Mr. Figliuzzi said in an interview that the FBI decided to end its more than 10-year-long counterspy investigation of the network because of concerns that the spies were “getting very close to their objective.” “These 10 Russian officers were sent to the U.S. on a...