at this point a conviction is still very hard to get. Even if a body is found, if there is not absolute evidence that is was homicide, Casey can (and will) always cop to a plea that it was an accident and she freaked out. the most they will get her on is unlawful disposal of a body. Maybe some other lesser felonies as well.
This 'airport' trip can also dovetail into the kidnappers story, she will just say that she brought Caylee to the airport and the kidnappers left the country with Caylee. We've seen posts here of folks who travel with young ones and that the kids identity is not verified in order to board a plane.
Yes, this is a big development but only if it leads to something else, some other evidence of non-accidental wong doing.
Otherwise I can easily see a defense attorney explaining this locatin away.
I truly hope that more comes from this, but at this point it can still leave room for reasonable doubt and not be enough to get a conviction.
Clearly you can tell that I feel Caylee has perished at the hands of Casey, however our legal system has such a high standard that I just pray the totality of the witnesses, evidence & perhaps finding Caylee's body, can be enough to put this monster Casey behind bars for a long time.