Under Wilkes's leadership, the regiment became adept at responding rapidly to the different tactics employed by terrorists. He also set up a robust liaison system linking the SAS commander to the police, the security services and the Cabinet Office Briefing Rooms (Cobra). In an increasingly turbulent world, other countries began to request help from Britain in developing their own specialised units to counter terrorism and to provide VIP protection. Then, in October 1977, a Lufthansa Boeing 737 on its way from Majorca to Frankfurt with some 90 passengers and crew was hijacked by terrorists armed with guns and explosives. The Germans asked the SAS for help and Wilkes dispatched a small team to offer advice to GSG 9, their anti-terrorist squad. The aircraft was stormed successfully at Mogadishu, Somalia, and the hostages freed. The operation gave added impetus to the expansion of training and organisation for anti-terrorist tasks by the regiment. Wilkes moved on in 1979, but the decisive intervention by the SAS in the Iranian Embassy siege in May the following year by Michael Rose (British Army officer) was convincing evidence of the value of his legacy. He served as Commanding Officer of 22 SAS