Police and security agencies in multiple countries are scrambling to piece together the background and intentions of Hamam al-Hammami, the 29-year-old co-pilot who attempted to take control of a plane from Dubai to Tel Aviv.[8046777] Investigators believe that al-Hammami originally planned his attack for July but postponed it, possibly because a friend was among the crew.[8046777][8020286] The evidence of prior planning suggests that al-Hammami may have specifically sought employment with an airline that flew to Israel in order to carry out the attack.[8046777] Australian police and intelligence are joining the investigation into al-Hammami's links to the country.[7851252] Aviation security protocols are under scrutiny after the incident, with questions raised about how al-Hammami was cleared to work despite being deemed a security risk.[7814936] Israeli authorities are trading blame for failing to flag al-Hammami as a security risk, with officials saying he had embraced extremist Islamist views.[7800818]