FOR AIR THURSDAY AM Late last week the Grand Forks and East Grand Forks City councils officially endorsed a 300-million dollar flood protection plan. The proposed dikes will snake along both sides of the Red River...and if all goes as the Army Corps of Engineers plan it will prevent the re-occurrance of flooding on the scale of 1997. But as Minnesota Public Radio's Hope Deutscher reports in Part 4 of our flood series, the construction of new dikes will come at the cost of more peoples homes and local history. For the people of Greater Grand Forks, the planning see