"What studies say the number one best way to start an exercise habit is to give yourself a reward tha..." — Charles Duhigg

After World War I, while France and other Allies were building military defenses modeled on trench warfare, German commanders were shaping a nimble fighting force.

Lawsuits against reverse mortgage companies, including the nation's largest, Financial Freedom Senior Funding, contend that those firms helped pressure older Americans into bad investments.

Public employee unions, in their defense, say politicians have unfairly made them into simplistic bogeymen, responsible for problems that have myriad causes. Not all government workers receive generous pensions, they note.

Everyone dies, and before that, most people eventually lose some of their faculties. So some people worry that as marketers get better at targeting the elderly, the line between advertising and unscrupulous manipulation will be harder to discern.