NASA's longest-running rover on Mars, Opportunity, is no more. Officials declared the 15-year-old rover Opportunity dead Wednesday, eight months after by a ferocious dust storm. Flight controllers sent one final series of recovery commands Tuesday night, accompanied by one last wake-up song, Billie Holiday's "I'll Be Seeing You." There was no response from space, only silence. Opportunity lasted 14 ½ years at Mars, outliving its twin, the Spirit rover, by several years. The six-wheeled geologists landed on the red planet in 2004. Remarkably spry until communication ceased last June, Opportunity roamed a record 28 miles (45 kilometers) around Mars. Its greatest hits were confirming liquid water once flowed on Mars and describing an ancient environment that may have supported life.