[HoustonCurmudgeon]

Does anyone know if the shuttles have the ability to abort a landing at any time during the re-entry process?

No they don't. Once they start down they are committed to landing somewhere.

[Sally'sConcerns]

Thanks, the reason I was asking is I was having a discussion on another board and they were stating the engines wouldn't be on at anytime during re-entry and there would be limited fuel.