The 72nd meeting of the Bilderberg group, the elite and secretive policy conference that is the longtime subject of endless conspiracy theories, was held at the weekend in Washington DC. A security cordon went up around the opulent Salamander hotel for the notoriously media-shy summit, which was packed as ever with prime ministers, military leaders, tech billionaires and the heads of giant investment companies. Bilderberg, which since the 1950s has been the intellectual engine room of Nato, took place this year at a time of immense crisis and uncertainty. Away from Trump's bluster, and for all his rhetoric about abandoning Nato, there were no signs that the Americans are withdrawing from Bilderberg. Far from it the Americans were there in force. Wall Street titans, including the CEOs of KKR and Lazard, and the heads of huge corporations like Pfizer, met behind closed doors with a delegation of senior politicians close to the president. Big business lobbying in private is Bilderberg's speciality, and this secretive mix of the private and public sectors fits perfectly with Trump's brand of crony-capitalism. This year's conference had a wartime flavour: with the "Future of Warfare" on the agenda, and a participant list including the four-star admiral Samuel Paparo, head of the US Indo-Pacific Command. From the private sector there was a healthy contingent of military contractors and drone manufacturers.