Character reveals itself in bad times more than in good.

It would be totally accurate to say that Joe Finn’s character revealed itself at any number of fires he has worked over the last 36 years, none more so than a horrible March day in the Back Bay in 2014, when the wind howled with a mournful evil, as if it had originated in hell.

Joe Finn was the deputy chief in charge of that wind-whipped fire and he had to make the hardest decision in his life, which was to pull everybody working the fire out of the building, even though two firefighters were trapped inside…