At the time he remembered meeting Mildred in Chicago bombs were falling. I almost think it’s a literal life flashing before your eyes moment. Earlier in the book he is racking his brain to remember and in the moment he could possibly die he remembers.
It makes it more significant because when he was talking to the others he said he felt nothing for Mildred. But in his possibly last moments he thinks about her.
I think it does mock their marriage. Mildred didn’t care for him anymore and they both let their marriage go past the point of saving. And when Montag is about to be possibly blown to bits he thinks of the Mildred he did love. The Mildred he met in Chicago he loved but not the distant, electronic junky he slept in the same bed with for years. 

Because they had control over the book and what it said. Like censorship and have a rule book to fall on Incase anyone did argue.

Because every fireman had done it. They all had to burn the book within 24 hours though so they wouldn’t get in trouble.

I would memorize a history book. In the book they changed the past without anyone knowing because they didn’t learn about it.

I think the chapter gets its title from when Montag enjoyed burning the books and the official symbol of the firefighter being the salamander.

“Once as a child he had sat upon a yellow dune by the sea in the middle of the blue and hot summer day, trying to fill a sieve with sand, because some cruel cousin had said, “fill this sieve and you’ll get a dime!” And the faster he poured, the faster it sifted through with a hot whispering. His hands were tired, the sand was boiling, the sieve was empty. Seated there in the midst of July, without a sound, he felt the tears move down his cheeks.”

“I’m numb, he thought. When did the numbness really begin in my face?”

“he remembered the terrible logic of that sieve, and he looked down and saw that he was carrying the Bible open. There were people in the suction train but he held the book in his hands and the silly thought came to him, if you read fast and read all, maybe some of the sand will stay in the sieve. But he read and the words fell through, and he thought, in a few hours, there will be Beatty, and here will be me handing this over, so no phrase must escape me, each line must be memorized. I will myself to do it.”

“"Would you like me to read? I'll read so you can remember. I go to bed only five hours a night. Nothing to do. So if you like; I'll read you to sleep nights. They say you retain knowledge even when you're sleeping, if someone whispers it in your ear."”

 

Montag, lying there, eyes gritted shut with dust, a fine wet cement of dust in his now shut mouth, gasping and crying, now thought again, I remember, I remember, I remember something else. What is it? Yes, yes, part of the Ecclesiastes and Revelation. Part of that book, part of it, quick now, quick, before it gets away, before the shock wears off, before the wind dies. Book of Ecclesiastes. Here. He said it over to himself silently, lying flat to the trembling earth, he said the words of it many times and they were perfect without trying and there was no Denham's Dentifrice anywhere, it was just the Preacher by himself, standing there in his mind, looking at him ....”

“The sun was touching the black horizon with a faint red tip.”

“men slowly turned from looking up river and were drawn to the fire, awkwardly, with nothing to say, and the sun coloured the backs of their necks as they bent down.”