CIRCLE WITH A DOT

@Richard_Littler I'd thought of it as a sucking vortex. I like yours better

This appears to partly have happened because one controller was forced to do the work that absolutely requires at least two. It's not standard practice to have the same guy handling both air and ground clearance https://www.cbsnews.com/newyork/news/air-traffic-control-deadly-laguardia-runway-crash/ #laguardia