(Reuters) - Last March, a 103-year-old resident of a Sunrise Senior Living facility in Willowbrook, Illinois, went on a field trip to the movies. Ruth Smith, who used a walker, fell down two concrete steps in the theater and died about six weeks later. Now Smith’s estate is suing Sunrise, saying that aides did not properly watch her. FILE PHOTO: A senior citizen, walks down the hallway with the aide of her walker to visit a neighbor at her independent living complex in Silver Spring, Maryland April 11, 2012. REUTERS/Gary Cameron/File Photo As the U.S. society ages, senior living communities are on the rise. So are claims and lawsuits against them. And when they lose, it is usually down to insurers to pay up. “It’s a tremendous opportunity that has pretty specific challenges,” said Brendan Gallagher, who heads the senior care business at insurance broker Arthur J. Gallagher & Co. (AJG.N) Some senior living facilities could see insurance rate … [Read more...] about Big claims strain senior living market for U.S. insurers