Usually Hollywood's insistence on remaking perfectly good films just because they're a few decades old or not in English makes me want to wretch. But if a remake is what it takes for more people to see Three Days of the Condor, then they should totally remake it. In addition to being an excellent thriller, it's eerily relevant to current events. So, rent it, buy it, whatever. Just watch it, you won't be disappointed. The Wikipedia article has a great synopsis, but be warned, it's full of spoilers.