Omalu has been able to examine four brains those of former Philadelphia Eagles defensive back Andre Waters, former Pittsburgh Steelers offensive linemen Mike Webster and Terry Long and former Denver Broncos running back Damien Nash. Webster, Long and Waters all showed signs of severe punchdrunk syndrome, and Long and Waters committed suicide. Nash, who died Feb."Most everybody was conscious. They were very dazed."The fiery twin blasts took place almost simultaneously and about 100 yards apart, knocking spectators and at least one runner off their feet, shattering windows and sending dense plumes of smoke rising over the street and through the fluttering national flags lining the course.When the second bomb went off, the spectators' cheers turned to screams. As sirens blared, emergency workers and National Guardsmen who had been assigned to the race for crowd control began climbing over and tearing down temporary fences to get to the blast site.Blood stained the pavement,