The signs were subtle at first. Then obvious. Then terrifying and heartbreaking all at once.
For Julie Karceski, it was when her mother had small memory lapses and became angry if anyone pointed them out.
For Dylan Cooke, it was when her mother forgot to pick her up at the airport after Dylan's return from a year in Nicaragua.
For Lindsay O'Bannon, it was when her mother couldn't seem to master the simple rules of the board game her family was playing at a holiday gathering.