A doorman in a bowler hat. A bellboy buzzing around a busy hotel lobby. A quarantined oak-paneled piano bar. Investigators focused on London’s Millennium Hotel on Friday, as evidence grew that it was the scene of a sensational crime — the place where someone poisoned former Russian spy Alexander Litvinenko with the lethal radioactive substance polonium-210. Litvinenko huddled over tea and gin there at a meeting last month with two fellow Russians — a gathering that may have led to his death, the hospitalization of a Russian businessman and deteriorating relations between Britain and Russia. Full Story