I'm on that level where you have to rescue the pilot Lieutenant, and bring him to a resistance safehouse or whatever it's called.
Anyway, I cleared the entire zone, including all houses that you can gain entrance to, and the church. There's no where left to go... I even walked along the entire zone wall, at an angle while moving forward, to see if I missed a break in the zone wall somewhere... nope. I am truly stuck. Any advice would be greatly appreciated. Thanks.

-The Stiffmeister

/bump

there is a switch on the right side of the altar. Push it and it will open a secret entrance

Thanks Xhale!