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The nation’s highest tribunal. Justices convene October through June in public sessions. Lines form to hear whole argument (seating starts at 9:30 am) or three-minute portion (seating starts at 10 am). Lines re-form after lunch. M-F 9 am-4:30 pm. Free. When court isn’t sitting, lectures on the half-hour from 9:30 am-3:30 pm. Cafeteria, gift shop. Plaza-level entrance facilitates security checks for entry.