My husband and I arrived at IAD so early we were able to take an earlier flight. Even though we were arrived at the gate with only carryon less than 20 minutes before the posted departure time, they took us with no questions and no *random* check. My brother was in MIA with a checked bag and asked for standby. They went through the bag twice after asking him if he was travelling alone. Even though there was space on the next flight more than two hours away, they made him wait 4 hours. This makes no sense. If anything, we were more suspect for the last minute change. Maybe their real *security* plan is to make it up as they go along.