Millennials

A few years ago, Nathaniel Hudson-Hartman, 38, calculated that he'd need about $1.5 million in savings to retire comfortably in his sixties.

• The baby-boomer "time bomb" is finally upon us, economists say.
• All boomers will be at least 65 soon, the generation's point of "peak burden" on the economy.
• Future generations can take solace in the fact that no boomer-size generations are in the making.

A time bomb has been ticking in the US.

Not many of Jess Munday's San Francisco friends live alone. But Munday, a 29-year-old who works in tech marketing, was able to swing it.