(UPDATE 2/10/2013) See my latest post on this topic. The crane is remote-controlled, but there are human workers right on on the platform who have to be there to observe the work to make sure the work is done properly and safely.
It's snowing heavily at the plant. The equipment to remove the debris from what used to be the operating floor of Reactor 3 is remote-controlled.
From TEPCO's Photos and Videos page, 2/8/2013:
According to TEPCO, the debris is "assumed to be the fuel handling machine mast", and it is a "possible" drop. Since no one can be there to witness the event firsthand, it is always a possibility, I suppose.
The radiation levels in and around the Reactor 3 building remain very high, although I don't remember any reporting of how high they actually are for a very long time. I think it was in 2011 when the human workers dared enter the reactor building. I remember seeing them making very quick swipes of the floor. I wonder if they did the analysis.