We have very limited international non-stops from Indy so our first hop is almost always domestic and layover times are often not long enough for any sort of additional security before heading overseas.
The airline industry tells us to be at the airport 1 hour before a domestic flight and two hours before an international flight. To put on my 3 year-old hat, "Why?" Why so early for international flights? In my limited experience check-in takes no longer nor does security. So unless they are just messing with us, something must be going on behind the scenes.
Are they doing some sort of last minute TSA check and might deny you boarding? For leisure travel they have months to do that?
Does luggage bound for international destinations go through additional checks?
Looking forward to your sage responses.