Wall Street rally loses steam on losses across sectors

Wall Street slipped for the first time in three days on Wednesday due to losses across sectors, hindering the Dow's march towards 20,000, a level it has never breached. The blue-chip index came within 19 points of the milestone shortly after the open, before slipping into negative territory as losses in Boeing and Walt Disney offset Goldman Sach's 0.96 percent gain. Boeing fell 0.8 percent to $156.26 after Delta Air Lines said on Tuesday that it had reached an agreement with the planemaker to ca