 Happening today, the search for graves connected to the 1921 Tulsa Race Massacre resumes at Oakland Cemetery. It comes after forensic teams have just recently identified a victim, they say, of the violence buried in an unmarked grave there. Another round of excavations beginning today. In our top story, a sitting president drops out of the presidential race. It's the first time since 1968, a lot of people drawing comparisons there, the path to this decision.