That's not as easy as it sounds!! She doesn't have much money and maybe no one back in the USA to "vouch" for her US citizenship...maybe her passport has been stolen, maybe something else has happened. People who leave the USA in poverty and find themselves in even worse poverty abroad have a harder time getting back "home" than people from Muslim countries do getting a visa to "visit" the USA these days.

Do you people know what airfare from Europe into the USA is one-way and booked at the last minute?! The US Embassies only repatriate people from situations like this if there is a life-or-death emergency in the immediate family. They say otherwise but in reality it would have to be death of an immediate family member, not any situation they can simply pawn off as "you" got "yourself" into through lack of financial planning on "your" part. There's a "you brought this on yourself" attitude at the embassies abroad that always precedes their refusal to help you!

Don't just assume anyone with US citizenship is rich enough to afford last-minute plane fare back from overseas.