Source for at least the second photo. I didn't check the other. It's photo 467 of 649.
http://news.yahoo.com/nphotos/Democratic-National-Convention-Senator-Joe-Biden-2008-Democratic-National-Convention-Michelle-Obama-vice-presidential-nominee/ss/events/pl/073008dncdemocratcon/im:/080829/480/8210e222956f4d21b1449107ae90d1a5/
Comment: The photo on the right shows clearly that he placed the flag upside down and touching the floor deliberately. Check out how the stick is propped up against the chair. Not that he would have done it with the intent of disrespecting the flag, but rather that he apparently didn't care enough to give it much thought.-ETL