The Internal Revenue Service says it has seen a 400% increase in phishing and malware this tax season, and is warning taxpayers and preparers not to click on tax-related emails.

U.S. and Cuban officials signed an agreement in Havana that provides for the reopening of scheduled air services between the two nations for the first time in more than 50 years.

Nearly two-thirds of U.S. adults say they get a physical exam every year, according to a 2014 Kaiser Family Foundation survey of 1,500 people.

Much more is highlighted in A Look Around the Nation and the World.