AL HA'NISIM
1)
Rationale -
What is the rationale for adding "Al ha'Nisim" in the Shemoneh Esreh, and in Birkas Ha'Mazon? How might this determine into what Berachah it should be inserted?
2)
Is it obligatory? -
The Gemara discusses whether it is obligatory to add "Al Ha'Nisim " to Birkas Ha'Mazon; why does the Shulchan Aruch conclude that indeed it is?
