• In this photo taken on Thursday, April 21, 2016, unaccompanied minors from Egypt, from left, 16-year-old Fathi, 17-year-old Saied, 17-year-old Gamal, and 17-year-old Ayman, last names not available, sit next to the river Tiber after an interview with The Associated Press, in Fiumicino, 30 kilometers (19 miles) west of Rome. All across Europe, there is a growing shadow population of thousands of under-age migrants who are living on their own, without families. They hide silently and in plain sight, rarely noticed in the crowd. Nobody even knows how many of them there are -- Europol estimates broadly that at least 10,000 kids have gone missing from shelters or reception centers.(AP Photo/Andrew Medichini)

    Thousands of underage migrants live in shadows across Europe

    Outside the train station in Rome, teen migrants sell drugs from school backpacks and trade sex for cash or clothes. In the capital of Sweden, they steal food from supermarkets and sleep on the streets. From makeshift camps along the northern French coast, they try to hop at night onto the backs of moving trucks headed to Britain.

  • In this photo taken on Friday, April 29, 2016, unidentified Egyptian youths hang around at night near Rome's Termini station. All across Europe, there is a growing shadow population of thousands of under-age migrants who are living on their own, without families. Nobody even knows how many of them there are -- Europol estimates broadly that at least 10,000 kids have gone missing from shelters or reception centers.  (AP Photo/Alessandra Tarantino)

    Thousands of underage migrants live in shadows across Europe

    Outside the train station in Rome, teen migrants sell drugs from school backpacks and trade sex for cash or clothes. In the capital of Sweden, they steal food from supermarkets and sleep on the streets. From makeshift camps along the northern French coast, they try to hop at night onto the backs of moving trucks headed to Britain.

  • In this July 26, 1956 file photo, the Italian luxury liner Andrea Doria keels far over to starboard before sinking 225 feet to the bottom of the Atlantic 45 miles off Nantucket Island, Mass. Nearly six decades after the Andrea Doria slammed into another ocean liner, killing 46 people, explorers are preparing to do what 16 others have lost their lives attempting: get a fresh glimpse of the wreckage on the sea floor. Everett, Washington-based OceanGate will use a five-person submarine in June 2016 to get high-definition video and 3-D sonar images of the shipwreck.  (AP Photo/John Rooney, File)

    Explorers plan June mission to Andrea Doria shipwreck

    BOSTON (AP) — Nearly six decades after 46 people died when the Andrea Doria sank to the sea floor following a violent collision with another ocean liner south of Nantucket, Massachusetts, explorers are preparing to do what 16 people have lost their lives attempting: get a good look at the wreckage.