Frank pushed for a "fundamental clarification of the relationship with the Palestinians." Because the conservative-led German government in the mid-1960s was considered pointedly pro-Israel, key Arab countries had broken off diplomatic relations with Bonn. Egypt and Algeria had only brought ambassadors back to Bonn shortly before the 1972 Olympics. Frank speculated that further attacks by Black September could threaten the German-Arab rapprochement. That, in turn, could jeopardize Germany's oil supply and export contracts. This prompted Frank and his diplomats to seek direct contact with the PLO at the end of 1972, first in Cairo and then in Beirut.