By TOM MARINER // Last week, I visited the 4-mile-wide dot called Key West at the end of the giant fishhook chain of islands hanging from the bottom of Florida. One of the local attractions in Key West is the Little White House, where Harry S. Truman, the 33rd President of the United States, took the nation’s business when he wanted to get away and think. We took an educational tour with an enthusiastic, knowledgeable…

By GREGORY ZELLER // Two Long Island hospitals – one in each county – are among three Northwell Health facilities to earn state approvals for next-level heart-procedure laboratories. Plainview Hospital, Port Jefferson’s Mather Hospital and Lenox Health Greenwich Village have each earned New York State Department of Health approvals clearing the way for new cardiac catheterization laboratories. The labs will be stocked with X-ray-guided catheters, key to a range of minimally invasive heart procedures. The…