Article continues below advertisementNewsNation correspondent Brian Entin highlighted a recent surge in FBI activity in the Tucson, Ariz., neighborhood where Nancy Guthrie, the 84-year-old mother of Today show co-anchor Savannah Guthrie, was abducted on February 1."The FBI has been back in Nancy Guthrie's neighborhood - asking about neighbors who moved out before Nancy vanished and also interested in a home under construction and the names of all the crew members who have worked on the house," Brian posted on X.