Brent crude surged nearly 20% as nervous traders speculated about the impact on global supplies.
The drug maker, accused of fuelling the opioid crisis, files for Chapter 11 bankruptcy protection.
Almost 50,000 workers are due to join the strike, the first major stoppage at GM since 2007.
The BBC's Katie Prescott assesses whether drone strikes on Saudi oil facilities could affect consumers.
The discount retailer is taking on its larger rivals as it continues to expand even as profits fall.
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