The Bay Area Rapid Transit District’s board of directors and union leaders are welcoming a report on what went wrong in the 2013 negotiations, and how to improve negotiations in 2017. The report offers recommendations on changing what it calls a culture of mistrust and hostility that led to a series of strikes and what it calls “horrific mudslinging” in the negotiations over the last BART workers contract. At a hearing on the report, BART’s board president Joel Keller announced he’s withdrawing a proposal that would ban transit workers strikes. Christopher Martinez reports from Oakland.