 France is to face severe public transport disruptions on Thursday, operators have warned, as workers join a nationwide strike against a widely unpopular pension reform plan.The suggested changes, still to be debated in parliament, would raise the retirement age from 62 to 64 and increase contributions required for a full pension.The industrial action across different sectors on Thursday will be the first time in 12 years -- since that age was increased from 60 to 62 -- that all of Frances union... 