JUDY WOODRUFF:

As we near the gruesome sixth anniversary of the war in Syria, daily documents of the carnage there now flood the Internet. Photos and videos posted by both civilians and combatants catalogue the shocking depths of human cruelty and possible war crimes.

Now human rights investigators are increasingly turning to the Internet to track what's happening, not only in Syria, but in other conflict zones.

As part of our Breakthroughs coverage of invention and innovation, special correspondent Cat Wise reports on a new university program training students to become human rights investigators in the digital age.