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Strategic angle: Olympic champion and world-record holder Keely Hodgkinson qualifies fastest for Sunday's 800m final at the World Indoor Athletics Championships in Poland.
Strategic angle: Switching from a gasoline engine to a diesel-powered setup is an enticing possibility, but it requires a lot more work than you might think.
Strategic angle: CF Industries aided by access to low-cost US natural gas as energy crisis slams Asian and European competitors
Strategic angle: The conflict in Iran intensifies, raising concerns over Trump's ability to manage the situation.
Strategic angle: The difficulties for families adds to the patchwork of complaints about immigration oversight and other issues while the department remains without government funding for five weeks.
Strategic angle: A negotiation story that highlights the dynamics of car sales.
Strategic angle: Ronnie O'Sullivan made it through to the World Open final after clinching a deciding-frame thriller against Wu Yize.
Strategic angle: Prague could see one of its largest demonstrations in recent years on Saturday against perceived democratic backsliding.