In playing Fate (Dresden Files, Fate Core), one problem has reared it's ugly head more than once. And I'm not sure if it's something that I'm doing wrong, if it's the way that the players are approaching the situation (same players in all iterations), or it's just the way that things are supposed to be.
My players do things to avoid the risk of failure. And that's quite easy to do in Fate, because of the position of the roll in resolution of tasks, and the small window that the dice present, i.e. -4 to +4.
They will not invest in the Fate point system at earlier, non critical points in the narrative, or even worse, invest in it only to the point of increasing their Fate pool, i.e. putting themselves in positions to fail or get a less than optimal result in return for increasing their pool.
Then, at the critical juncture in the adventure, i.e. defusing the bomb, interrupting the ritual, etc., the dice roll is almost an after thought. They roll the dice (re-rolling if it becomes too much of a problem), and use the pool that they have amassed to make the desired outcome occur through the use of aspects.
And it's awesome and a point of triumph- but that feeling of the possibility of failure on those circumstances is gone. They no longer roll to find out what happens... they roll to find out a starting point.
How do I bring back that tension of the possibility of failure, when dealing with players that are pretty much masters of risk mitigation?