Not to sound too morbid, but with the recent loss of the Flight 370, and with the growing number of missing from the landslide in Oso, Washington, and now, once again, another shooting at Ft. Hood, I am reminded that our lives can end at any moment. Often there is no preparation. The people in Oso were eating at their tables, drinking tea, getting ready for work; seconds later, they were fighting a losing battle for their lives. The only moment guaranteed is the one just past. Most have a religion, many do not, but whatever you take solace in, you had better be sure it will sustain you in that last gasp for air; because, we are all fellow passengers on an unknown voyage. None of us know when the conductor will announce that we have arrived at our destination.

All the people in this article from the Seattle Times were busy about their lives; in seconds, all that changed. 

http://seattletimes.com/flatpages/local/victimsoftheosomudslide.html