The Dow Jones Industrial Average broke 29,000 for the first time in its history Friday morning, despite new data showing sluggish jobs growth. The blue-chip index hit an intra-day high of 29,009.07 shortly after 10 a.m., marking a nearly 0.2 percent increase from Thursday’s close of 28,956.90. The milestone came despite Friday’s monthly jobs report showing slowing employment growth, with the US economy adding 145,000 gigs in December. That’s down from November’s revised total of 256,000.