Mr. Ross was speaking from the Paris Air Show, where aerospace executives are gathering amid concerns for an industry grappling with the fallout of the four-month grounding of Boeing Co’s 737 Max airliner, as well as global trade tensions that have darkened the outlook for many businesses. The assembled aerospace executives, like those in many industries, are closely watching developments in the U.S.-China trade talks, which U.S. officials said were nearing a deal before the talks reached an impasse last month. “Even real shooting wars end with negotiation, and this will ultimately end in negotiations,” Mr. Ross said. “Whether that will be in 10 minutes, 10 weeks, 10 months or longer, it’s not possible to judge.” Negotiations fell apart with U.S. accusations that China backtracked on terms already agreed upon. China denies it did so. Since then, in addition to increasing punitive tariffs on roughly $200 billion of imports, […]