By MENELAOS HADJICOSTIS EASTERN MEDITERRANEAN SEA (AP) — Britain's newest aircraft carrier, HMS Queen Elizabeth, is helping to take on the “lion’s share” of operations against the Islamic State group in Iraq, U.K. naval commanders said. It has also piqued the interest of Russian warplanes, who try to keep tabs on its cutting-edge F-35 jet in a “cat-and-mouse” game with British and U.S. pilots. Speaking