I-91 Reconstruction Information
FILE  - In this Tuesday, Aug. 19, 2014, file photo, a sign for Aetna Inc., sits atop a building at the company headquarters in in Hartford, Conn. Health insurer Aetna Inc. has made a deal to buy competitor Humana Inc. in a $37 billion deal the companies say would create the second-largest managed care company, it was announced Friday, July 3, 2014. (AP Photo/Jessica Hill, File)

Insurer Aetna to buy Humana in $37B deal

HARTFORD, Conn. (AP) — Health insurer Aetna Inc. has made a deal to buy competitor Humana Inc. in a $37 billion deal the companies say would…