WASHINGTON - The US Senate on Thursday unanimously passed a resolution that recognizes as a genocide the mass killings of Armenians a century ago, a move likely to infuriate Turkey and further strain ties between Ankara and Washington.The Democratic-led House of Representatives passed the resolution by an overwhelming 405-11 in late October. But a vote in the Senate, where President Donald Trump's fellow Republicans hold a majority of seats, had been blocked several times by Republican senators.