SALT LAKE CITY (AP) — As ski resorts across the United States grappled with how to help prevent the spread of the coronavirus without having to close, industry giants Vail Resorts and Alterra Mountain Company decided Saturday they would shutter 49 of North America’s most well-known resorts. Vail Resorts said it would shut down its 34 resorts for at least one week before reassessing while Alterra is closing its 15 until further notice.  Other resorts that remain open are closing enclosed gondolas or aerial trams while others are encouraging skiers to ride lifts with only people they know as they adhere to social distancing guidelines.