Is the divorce rate in America really 50%?

I find that so hard to believe.
Yet I'm realizing that for every co-worker I hear about that's getting married or is currently married (happy or not), I know just as many that are divorced. How can everyone around me be getting married, yet so many are divorced? Half the interns have step-parents, and I hear about 'I get the kids this week' all over the office.
It's very disheartening.