New Yorkers are struggling to find COVID-19 tests as the city suffers a surge of infections driven by the highly transmissible Omicron variant. After New York recorded a record number of new cases on Friday, each new positive test is kicking off frantic text messages to friends and colleagues warning them to get tested, and the looming Christmas holiday is prompting scores more to seek the tests before they travel. The surge in demand has stretched the city's testing capacity to the limit, with wait times of more than two hours on Saturday at some city testing centers and pharmacies...