Starbucks says its stores saw minimal disruption as thousands of union baristas launched a nationwide strike on Red Cup Day.

Starbucks Workers United is calling the strike the "red cup rebellion," since the strike coincides with the coffee chain's annual Red Cup Day promotion.

Some like their coffee bold and black, while others take it sweet and sugary. No matter your preference, you’ve probably glanced at the iconic green Starbucks logo and had a craving for caffeine (or ...