Kennebec Journal: That’s the plan of environmental author and activist Bill McKibben, who said Tuesday that he and a group of Unity College students would travel with the panel as part of an effort to get President Barack Obama to put solar panels on the White House. McKibben was expected to take his announcement to a national audience during an appearance Tuesday night on quot;The Late Show with David Letterman.quot; The panels were installed on the White House roof in 1979, removed in 1986 during the …