AIR BUBBLES AND AIR BRIDGES Plans for so-called air bridges and travel bubbles are agreements between countries allowing citizens to cross borders without needing to quarantine , inorder to provide hope for a resumption of travel, allowing international commerce and tourism to return. But rather than reuniting a fractured world, the reopening of travel based on separate international circles of trust risks introducing new divisions. In particular it will highlight the clout of three major powers—China, the European Union, and the United States—while also dividing the world into countries that have handled the pandemic well from those who have struggled. With the bubbles come a new—if, hopefully, temporary—geopolitical order divided along epidemiological lines, with complex implications for trade, tourism, and investment patterns. The collapse of global travel is unprecedented. About half of the world’s flights have been grounded, and passenger travel has declined by 95...