The Democrats and the Republicans don’t agree on much, but there is one thing that their conventions have in common: huge requirements for security. The Republican Convention in Cleveland, with controversial candidate Donald Trump expected to secure the party’s nomination, could be especially contentious.

Interest in drones from the retail sector is growing rapidly as competitive pressures push retailers and distributors to develop new ways to make their supply chains more efficient, to automate warehouses, and to reduce delivery costs. Walmart, the nation’s largest retailer, recently announced plans to use drones for inventory management in its warehouses. Amazon, the nation’s largest internet retailer, is researching the use of drones to deliver packages to consumers. Global e-commerce giant Alibaba is testing delivery drones in China while DHL is already using drones to deliver packages in Germany.