PHILADELPHIA (CBS) -- President-elect Joe Biden marked Veterans Day Wednesday with an unexpected visit to a Philadelphia war memorial, while President Donald Trump stopped at Arlington National Cemetery. Veterans and their loved ones have been stopping by all day to the Philadelphia Korean War Memorial at Penn's Landing, but this year's memorial came with a surprise appearance by Biden."Really, really, really cool," said Steve Charanella.Following the Honor Guard, President-elect Biden and Dr. Jill Biden placed wreaths at the Korean War Memorial.President-elect Biden, who was masked for the...…PHILADELPHIA (CBS) -- President-elect Joe Biden marked Veterans Day Wednesday with an unexpected visit to a Philadelphia war memorial, while President Donald Trump stopped at Arlington National Cemetery. Veterans and their loved ones have been stopping by all day to the Philadelphia Korean War Memorial at Penn's Landing, but this year's memorial came with a surprise appearance by Biden."Really, really, really cool," said Steve Charanella.Following the Honor Guard, President-elect Biden and Dr. Jill Biden placed wreaths at the Korean War Memorial.President-elect Biden, who was masked for the...WW…