Former President George W. Bush declined President Obama's invitation to hang out with him at Ground Zero on Thursday, saying through a spokesman that he "appreciated the invite, but has chosen in his post-presidency to remain largely out of the spotlight." Obama is visiting the World Trade Center site to meet with families of 9/11 victims and buy one of those "Go SEALs!" t-shirts; he extended the invitation to Bush after the guy from Five for Fighting Tweeted about it—and we all know how much Obama loved "Superman." [NYT; image via AP]