Years ago, while my husband and I were visiting the Smithsonian Air and Space Museum in Washington, DC, we noticed a baby stroller by itself with no one nearby. We assumed that the parents had left it there because it was too bulky and were now carrying their child. But as we approached, we saw a sleeping baby inside. Where was a parent . . . a sibling . . . a babysitter? We hung around for quite some time before hailing a museum official. No one had shown up to claim that precious child! The last we saw of him, he was being wheeled away to a safe place.