I have flown in and out of Logan a lot. I have twice suggested Logan adopt an inside-security shuttle between concourses to put an end to their double TSA screening of connecting passengers. I clear TSA at my home airport and am forced to leave security upon arrival and walk a mile or wait for an inconsistent outside-the-terminal shuttle bus and get back into a TSA line with hundreds of people. They are creating their own turmoil. SEA-TAC shuttles people from one gate at one concourse to another gate at another concourse. People remain screened and secured between concourses.