John Lewis spoke at George Mason University on the 24th of April. The Leacture was recorded and has been made available by The Objective Standard on their events page.
The lecture is based on his article "No Substitute for Victory" The Defeat of Islamic Totalitarianism which can be read in its entirety on The Objective Standard website.
John Lewis faces a hostile and disruptive audience, but fends them off like a true intellectual warrior with no real help from the moderator.
For an eyewitness account check out the Rule of Reason weblog:
John Lewis and the Battle of George Mason
Crass and Class at George Mason