They’re heading to Walter Reed while in D.c.:

After the ceremony with the President, the team will go to the Walter Reed Army Medical Center and visit with some of the soldiers.
“Larry Lucchino took the trophy there the first week of January, and found it to be a very moving experience,” said Steinberg. “Moving because these men and women and just came back from Iraq. The injuries in many cases were very sobering. Larry’s description from that visit was that the attitudes of the men and women overwhelmed him. It was as meaningful a visit as I’ve ever heard him describe.”
So when the Red Sox got the invitation to go to the White House, Lucchino wanted to make sure they took advantage of all the opportunities presented to them.
“This was [Lucchino’s] idea,” Steinberg said of the visit to see the soldiers. “He said, ‘The Boston Red Sox are going to the White House, don’t just turn around and come home. Make something more out of it. Go and see these soldiers and acknowledge to them that we know who the real heroes are.’”