I found out during work today, but managed to block it while I was there. Only now, having spoken to both Phillip and my mother about it, is it really hitting me.
The Rebbe is a very special person. I can only say that I pray he'll recover fully and be himself for many years to come. But I'm definitely scared. He is not a young man anymore.
Thanks, Yehoshua--his name is indeed Levi Yitzchak ben Sara Sasha. I appreciate the thought!