I think many Christians believe that free will is all around, but God does "tweaks" in the minds of other Christians who pray, and also does "tweaks" to the physical world in response to prayer as long as the prayer is consistent with God's plan.
So, the plan can get bent, but not really broken -- but only if you're a Christian.
So, the plan can get bent, but not really broken -- but only if you're a Christian.