August 12, 2011 1:59 pm Wolverine's claws have met Captain America's shield before. There's a pretty popular shirt/poster image out there (not the one from the cover at this link). http://www.wolverinefiles.com/2009/03/11/classic-wolverine-cover-captain-america-annual-8/
http://www.wolverinefiles.com/2009/03/11/classic-wolverine-cover-captain-america-annual-8/