Arianna appeared on CNN's "Reliable Sources" with Howard Kurtz on Sunday, discussing The Huffington Post's first Pulitzer Prize for Beyond The Battlefield, a 10-part series on wounded veterans by reporter David Wood.
Arianna described the event as a "breakthrough," expressing how "grateful" HuffPost was for the honor.
"The newsroom was elated and it means a lot for HuffPost -- for all our reporters and editors -- but also for online journalism," she said. "It's a demonstration that great journalism can be practiced on any platform."
Arianna pointed to how the series brought together all sorts of different elements of web reporting, from video to infographics to reader comments. She added that this is a sign of old media and new media coming together.
"We've always said from the beginning, back in 2005, that we want to embrace the best of the old and the best of the new," she said. "That's what we've done and that's what we're going to continue to do."
To read pieces from the Pulitzer Prize-winning series, click here.
WATCH the interview (via CNN):