I've climbed there a bit. There are (almost) no hangers/bolts there. Most people set TRs, with anchors built of 3+ pieces of gear. You ascend by, usually, scrambling up a backside, set your gear in cracks along the top, and hang a power-point over the edge to TR from.
It's generally pretty safe. The Columbian article (quoting the WSP) said the 2 climbers were both attached to a single nut and/or each other (?!), and the nut failed when they put their weight on it.
Which makes no sense to me. I'm trying to get more details, and will post if I do. - EMS