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Coronavirus infections might soon be flagged with a puff of exhaled breath, after the Food and Drug Administration authorized the first breath-based Covid-19 test in the United States on Thursday. The emergency use authorization of the InspectIR Covid-19 Breathalyzer is a meaningful milestone in the yearslong quest to develop more…

During his campaign for mayor last year, Mr. Adams said he planned to convert about 700 underutilized hotels into permanent housing. The hotel conversions have been on hold since last fall, when the city’s Law Department issued a technical ruling involving hotel occupancy regulations that nonprofit housing developers say effectively…

Facing an intensifying backlash from political parties and business groups, Gov. Greg Abbott of Texas on Friday ended his policy of inspecting all commercial vehicles crossing into the state from Mexico, a time-consuming process that had caused traffic jams of 14 hours or more at the border. Mr. Abbott said…

Activision Blizzard, the video game maker set to be sold to Microsoft for nearly $70 billion, said in a legal filing on Friday that it would cooperate with an investigation into whether some of the company’s investors engaged in insider trading before the deal’s announcement. The company said it had…

WASHINGTON — The Moskva was the pride of Russia’s Black Sea Fleet, a symbol of the country’s dominance of the region and a powerful war machine that had been used to launch precision cruise missiles deep inside Ukraine. Despite claims by Russia that an accidental fire broke out on the…

On Friday, Twitter countered Elon Musk’s offer to buy the company for more than $43 billion with a corporate tool known as a poison pill, a defensive strategy familiar to boardrooms trying to fend off takeovers but less familiar to everyday investors. This defense mechanism was developed in the 1980s…