Facebook/David McKeanMaeve Kennedy Townsend McKean’s husband has posted a heartbreaking tribute to his wife—the granddaughter of the late Sen. Robert F. Kennedy—and the couple’s child, who went missing in the Chesapeake Bay Thursday afternoon.The Kennedy family announced Friday that the Coast Guard suspended the rescue effort for McKean, 40, and son Gideon, 8, who disappeared after paddling a canoe out into the bay. The effort to recover their remains is ongoing.“The search that began yesterday afternoon went on throughout the night and continued all day today,” McKean’s husband, David McKean, wrote in a Facebook post late Friday. “It is now dark again. It has been more than 24 hours, and the chances they have survived are impossibly small. It is clear that Maeve and Gideon have passed away.”Read more at The Daily Beast.