Just won the Falcon yesterday (yaay me lol), and had a question on the Han Solo pilot card. His ability reads: when attacking, you may reroll all of your dice. If you choose to do so, you must reroll as many of your dice as possible. I am not sure exactly how this would work. Is that a one-time reroll? Or, as can also be read, do I get to reroll more than once? Or are you only "making an attack" once?
Example: I am shooting with Han, and roll, and it's only one hit. I decide to reroll, and it's the same: one lousy hit. Can I then reroll all of my dice again?