As Oil Profits Plunge, Gulf Regimes Weigh the Unmentionable: TaxesWall Street JournalDubai's year-round sunshine and near-zero taxes have been easy sells for foreign investors and expatriate workers. Oil's plummet below $30 a barrel might change th …

Wall Street JournalAfter Paris Attacks, Air Campaign Escalates Against Islamic State Oil AssetsWall Street JournalYet Islamic State has proved resilient at rebuilding its oil trade after past airstrikes and has diversified its revenue sources into such are …