Mayor's brother to keep contractAfter cries of patronage, Milton Street said he'd end his airport job. Now he says he'll sue to save it.By Thomas FitzgeraldInquirer Staff Writer “There’s no impropriety here,” T. Milton Street Sr. said of the $1.2 million contract. Renewing a family conflict, Mayor Street's older brother yesterday reversed course and vowed to hang on to a $1.2 million no-bid contract for maintenance work at Philadelphia International Airport.T. Milton Street Sr. said that to keep the money, he would drag the city and his brother into court if necessary."I'm not going to give up my business," Milton...