Each Marvel film is a link in a chain that keeps getting stronger as new links are added, and each new link benefits from the connections coming before it.

FORBES: Why 'Iron Man 3' Might Break $1 Billion This Weekend

It's a sequence of events, an inexorable chain reaction where each small link is fundamental, like a snake of upended dominoes.

NPR: Excerpt: 'The Sister'

Mr Levin focuses on trying to make each link in the discovery chain as efficient as possible.

ECONOMIST: Millennium��s bugs

Nowadays each link in the supply chain depends on all the others.

ECONOMIST: The economy

Each of these things is a link in a chain of good health and prosperity.

CNN: Empowered women make nations strong

They are small cubicles -- each individual will have one -- that has a wooden top and then nothing more than chain-link fence, exposing the person to the elements but of course also making him always available to be seen.

CNN: Franken