I didn't find the answer while searching this forum.
You have Echo Caverns in play and won the Edge. You have an AAC-1 Speeder Tank. The opponent have Darth Vader (TDOH) and Colonel Stark.
Can you put the focus token and Vader and in action window, focus Echo Caverns to remove the blast icon from Stark and add it to Vader's, preventing Stark from using it?