This just struck me. Many of the Classified Objective cards require your troops to perform a Short Skill in order to achieve the Classified, but none of the cards states whether this Short Skill has an Attack label. So by RAW, since no cards specify that these Short Skills are Attacks, this means that Flash Pulse cannot stop you from achieving the Classified Objective. Is this intended?
We can't really answer whether it is intended or not and CB answers questions too seldom for this type of insight. However, I'm fairly certain it is intended. Just don't forget to apply the -3 MOD from Stunned if applicable.
Well, I humbly hope that one of the CB personnel can clarify this. As of now we have never been considering that Flash Pulse can stop someone from completing a Classified, but I think this question might arise at some time, because all the ITS missions that require you to perform a Short Skill explicitly label it as an Attack.