Some participants voiced a high degree of concern over the global economy, saying the recent turbulence in financial markets — which saw the Dow plunge over 500 points on Wednesday — was akin to a "meltdown." FRANKFURT, Germany (AP) — With many barriers to dealing with Iran suddenly lifted as part of a nuclear deal, some European companies are ready to seize business opportunities in a tempting market of 78.5 million people. At first glance, the allure is obvious — Iran is the second-largest economy in the region, the second most populous country and it has infrastructure and vehicles overdue for an upgrade after years of sanctions. [...] those companies that take the plunge face serious risks from the remaining sanctions, geopolitical uncertainty, red tape and corruption. NOFEI PRAT, West Bank (AP) — Airbnb is coming under Palestinian criticism for listings that fail to mention the property is in a West Bank settlement, on occupied land claimed by the Palestinians. [...] criticism puts Airbnb in the crosshairs of an increasingly aggressive global boycott movement and has injected a dose of Mideast politics into the sharing economy. SAN JUAN, Puerto Rico (AP) — U.S.