President Trump imposed tariffs Friday on $50bn in ­Chinese products, signaling his willingness to unwind nearly a ­quarter-century of growing commercial links between the world’s two largest economies unless Beijing agrees to transform the way it conducts business.

Retailers and manufacturers are taking stock of their transportation costs and exploring alternatives as a capacity crunch in freight is driving up prices and causing shipping delays.

Challenge: Trading partners need to trust that inventory will arrive when scheduled — particularly during item promotions. Historically, location and arrival time was obtained via driver phone calls. But these projected arrival times didn’t consider traffic and weather conditions, and they were often too optimistic.

International Association of Ports and Harbors (IAPH) President Santiago Garcia Milà is calling for closer cooperation between various port-related organizations.

After nearly eight years of starts, stops and delays, the U.S. Department of Homeland Security (DHS) has finally implemented its much-debated Air Cargo Advanced Screening (ACAS) program — requiring all carriers of commercial cargo to report electronic airfreight data to U.S. Customs and Border Protection (CBP) before the cargo is loaded onto aircraft bound for the states.

The International Monetary Fund is warning that U.S. President Donald Trump’s new import tariffs threaten to undermine the global trading system, prompt retaliation by other countries and damage the U.S. economy.

The European commission has said the “simply unacceptable” imposition of high tariffs by the U.S. on Spanish olives is already having a major effect on producers in southern Spain.