I have two scenes in my opening chapter that are now out of chronological sequence. I've done this because the scene I open with deals with one of my MC on a plane that is unsuccessfully attacked by terrorists. I think it is a very exciting scene and will capture a readers interest. However, it is in the next scene that my second MC invites the first for a visit. He agrees to come and that's when his plane is attacked.
So, is it more important to keep the story in the proper chronological order or attempt to entice the reader even though the scenes are out of time sequence?