Need to get answers to such questions. Thanks in advance, guys.

1. what does sorties 2+ in a mission description means?
Doers it stand for an open number of missions? When is the mission ended then?

2. chance for a balloon: if there is a ballon drawn form an A deck is it automatically accompanied by ground support (mg's, guns)? or it may stay alone?

3. point 10 of the rules. Bombing: are planes always q\equipped with bombs or they are equipped with them for special missions only?