World's huddled masses use 4 key land, sea routes to Europe

In this Nov. 27, 2014 file photo a Greek coast guard officer, wearing a mask for fear of infectious disease, stands next to a small group of immigrants, on a launch carrying them to shore from a crippled smuggling ship holding more than 700 people, at the coastal Cretan port of Ierapetra, Greece. The ship, whose passengers are mostly Syrians, including children, women and elderly men, suffered engine failure 70 nautical miles off Ierapetra on Tuesday.

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