Bloomberg Beijing and other regions of north China were blanketed by the year’s worst bout of noxious smog, prompting officials to cancel 351 flight departures from the capital’s airport because of limited visibility. The concentration of PM2.5 — the particles that pose the greatest health risks — was 402 micrograms per cubic meter near Tiananmen Square at 5 p.m. …

  Bloomberg Southwest Airlines Co.’s website failed, blocking access to booking and flight check-in tools in a busy holiday travel week. The carrier said it was making progress in fixing the disruption and was getting reports of successful transactions and online check-in attempts around 5:45 p.m. New York time. The failure affected all customers but didn’t have any impact on …

  Lagos / AFP Nigeria’s Arik airline has resumed flights following a deal to end a one-day strike that paralysed its operation, the company said on Wednesday. Aviation unions called the strike on Tuesday to protest non-payment of seven months of salaries to Arik workers, non-remittance of taxes and the sacking of five union leaders. Thousands of local and foreign …