LONDON  UK Defense Secretary John Healey on Wednesday issued a strong warning to Russia after a “Russian spy ship” was spotted loitering near the UK’s critical undersea infrastructure. The ship, Yantar, entered the UK’s exclusive economic zone on Monday, approximately 45 miles (72.4 kilometers) off the British coast, and has remained there for two days. In a statement to parliament, Healey revealed that the Yantar is suspected of gathering intelligence and mapping vital underwater