Airport assistance for impaired adult?
A friend is considering travel from the US West Coast to Eastern Europe. This person suffered a serious stroke several years ago, has been fine since and walks OK, but still has some trouble with balance and, hence, things like stairs and escalators, and needs to avoid long walks (like from one end of FRA to the other). In my experience as a normal traveler, I find US airports much friendlier in general than European ones as far as passengers getting onto and (especially) off of aircraft and general navigation from one gate to another.
Are there generally adequate services at airports to deal with departing, connecting and arriving passengers with such needs? How are these arranged? How reliable are they? Other tips?