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What does European Parliament actually do?

(CNN)For years it was a rite of passage for European holidaymakers visiting another country on the continent -- the dreaded phone bill on the return home.No sooner had tans from skiing in France or beaching in Spain faded than Europeans were hit with eye-watering roaming charges for every call, text and Google search.Then suddenly the roaming charges vanished, almost as if by magic. Europeans could skip across borders with the same mobile phone allowances and fees they enjoyed at home.Behind the scrapping of roaming charges in June 2017 lay a tortuous, decade-long struggle by the European Parliament.Yet how many of European Union's 500 million citizens realize this far-reaching legislation -- called "roam like at home" -- was partly down t ...