The bottom-most point on a parabola is known as an inflection point — the point where the slope of the line goes from negative to positive. Sept. 11 was our inflection point, where we meet more chances to show them the peace in Islam.
Invite to the way of your Lord with wisdom and good instruction, and argue with them in a way that is best. Indeed, your Lord is most knowing of who has strayed from His way, and He is most knowing of who is [rightly] guided. (Q.S 16:125)