John 16:33
"I have told you these things, so that in me you may have peace. In this world you will have trouble. But take heart! I have overcome the world."
2 Corinthians 6:1-10
1 As God's fellow workers we urge you not to receive God's grace in vain.
2 For he says, "In the time of my favor I heard you, and in the day of salvation I helped you." I tell you, now is the time of God's favor, now is the day of salvation.
3 We put no stumbling block in anyone's path, so that our ministry will not be discredited.
4 Rather, as servants of God we commend ourselves in every way: in great endurance; in troubles, hardships and distresses;
5 in beatings, imprisonments and riots; in hard work, sleepless nights and hunger;
6 in purity, understanding, patience and kindness; in the Holy Spirit and in sincere love;
7 in truthful speech and in the power of God; with weapons of righteousness in the right hand and in the left;
8 through glory and dishonor, bad report and good report; genuine, yet regarded as impostors;
9 known, yet regarded as unknown; dying, and yet we live on; beaten, and yet not killed;
10 sorrowful, yet always rejoicing; poor, yet making many rich; having nothing, and yet possessing everything.
Matthew 24:9
"Then you will be handed over to be persecuted and put to death, and you will be hated by all nations because of me."
And finally, words of Wisdom from Solomon.
Ecclesiates 9:12
Moreover, no man knows when his hour will come: As fish are caught in a cruel net, or birds are taken in a snare, so men are trapped by evil times that fall unexpectedly upon them.
I can think of no better way to refer to those who perished on September 11th than "evil times that fall unexpectedly".
God does not promise us physical protection, but he does provide comfort and love here on earth and eternal life to those that believe.