Sad but true, and apparently necessary.
The last 3 Amber Alerts in our area ended up being non-custodial parents taking children out of the country without the permission of the custodial parent. Some how, in each case, the non-custodial parent had the child's Passport, and in each case, the non-custodial parent and child were already in the air on non-stop flights out of the country before the Amber Alert was issued.
In one case, they ended up in BUCHAREST.....and the child is still there because under Romanian law, what dad wants trumps what any U.S. court has ordered.