Complex sentence: Egypt recieves over a billion dollars in aid from the USA which is directly connected to protecting Israels intrests, Which includes guaranteeing that no weapons reach Palestinians from over or "under" the Egyptian boarder.
Split into simpler sentences: Egypt recieves over a billion dollars annually in aid from the USA. This aid is seen as being directly connected to protecting Israels intrests, Which includes guaranteeing that no weapons reach Palestinians from over or "under" the Egyptian boarder.