I understand in the Israeli prison system in certian circumstances prisoners are allowed vacation leave to be with family for a few days or every few years to take a short vacation. This is not the case in the United States. Very seldom does the United State's Justice System allow prisoners out unless they are on parole or being released entirely.
French tourist arrested for waving Israeli flag on Temple Mount (Haaretz)
from the article: Pollard's family asks Obama to let him attend father's funeral