The James Webb Space Telescope (JWST) project could be fantastic, It has the promise of seeing farther than Hubble, almost to the beginning of our space/time.
But, orbiting at L2 - while closer by far than other LaGrange points - is still 1.5m KM away from Earth. That is four times more distant than humans have ever travelled.
My question is this: This project has had a difficult construction history. (Most do but this has been more challenging). Are there ideas or plans for rescue/repair/restore missions if/when something goes wrong?