Perhaps Obama was afraid of going up in a puff of dramatic smoke? I dunno, you be the judge, according to your own beliefs:

Georgetown Says It Covered Over Name of Jesus to Comply With White House Request
Wednesday, April 15, 2009
By Edwin Mora

(CNSNews.com) - Georgetown University says it covered over the monogram “IHS”--symbolizing the name of Jesus Christ—because it was inscribed on a pediment on the stage where President Obama spoke at the university on Tuesday and the White House had asked Georgetown to cover up all signs and symbols there.

http://www.cnsnews.com/public/conten...x?RsrcID=46667