1 00:00:00,520 --> 00:00:03,840 Speaker 1: Welcome to Brainstuff from house stuff Works dot Com where 2 00:00:03,840 --> 00:00:15,560 Speaker 1: smart happens. Hi Marshall Brain with today's question. In the 3 00:00:15,640 --> 00:00:20,520 Speaker 1: movie Salt, could Evelyn Salt really have created an exploding 4 00:00:20,600 --> 00:00:23,840 Speaker 1: missile like you see in the movie? At the beginning 5 00:00:23,880 --> 00:00:28,080 Speaker 1: of the movie Salt, you see Evelyn Salt get outed 6 00:00:28,160 --> 00:00:31,560 Speaker 1: by a Russian agent and she is about to get 7 00:00:31,560 --> 00:00:35,280 Speaker 1: locked up, and she tries to escape, and she ends 8 00:00:35,360 --> 00:00:39,520 Speaker 1: up on this vacant floor of an office building, and 9 00:00:39,880 --> 00:00:42,680 Speaker 1: she needs a way to create a diversion. So what 10 00:00:42,800 --> 00:00:45,440 Speaker 1: she does in the movie is she disassembles a table 11 00:00:45,560 --> 00:00:48,800 Speaker 1: to create or to find a tube that she can 12 00:00:48,920 --> 00:00:52,680 Speaker 1: use as a missile launcher. And she finds some chemicals 13 00:00:52,680 --> 00:00:55,560 Speaker 1: and she mixes them together and she loads them into 14 00:00:55,600 --> 00:00:58,160 Speaker 1: a little cartridge that she finds at the bottom of 15 00:00:58,200 --> 00:01:01,000 Speaker 1: an office chair, and then she uses a CEO to 16 00:01:01,240 --> 00:01:04,919 Speaker 1: fire extinguisher to launch this thing and incapacitate a small 17 00:01:05,040 --> 00:01:08,399 Speaker 1: team of people who are trying to capture her. So 18 00:01:09,080 --> 00:01:12,120 Speaker 1: you watch it and you notice that she's mixing two 19 00:01:12,200 --> 00:01:14,840 Speaker 1: chemicals together. One of them is clearly marked as a 20 00:01:14,880 --> 00:01:18,480 Speaker 1: bottle of ammonia, and the other is a smaller bottle 21 00:01:18,560 --> 00:01:22,240 Speaker 1: with a dark red liquid in it. After mixing, she 22 00:01:22,280 --> 00:01:25,920 Speaker 1: gets this really kind of thick, reddish fluid that she 23 00:01:26,280 --> 00:01:29,760 Speaker 1: puts on some paper towels, loads into her little missile, 24 00:01:30,280 --> 00:01:33,920 Speaker 1: and then fires it. Is there any truth to this? 25 00:01:34,280 --> 00:01:38,720 Speaker 1: Is it possible to mix together any two maybe household 26 00:01:38,840 --> 00:01:43,000 Speaker 1: kind of chemicals and get an explosive that could incapacitate 27 00:01:43,080 --> 00:01:46,880 Speaker 1: a team of trained commandos? Most likely the writers of 28 00:01:46,880 --> 00:01:49,760 Speaker 1: the movie are trying to suggest that she's making something 29 00:01:49,800 --> 00:01:55,160 Speaker 1: called nitrogen triiadide, and it is a real chemical that 30 00:01:55,280 --> 00:01:58,920 Speaker 1: really can be made out of two simple chemicals that 31 00:01:59,000 --> 00:02:01,880 Speaker 1: you might find around the house. Traditionally, when you make 32 00:02:01,960 --> 00:02:06,720 Speaker 1: nitrogen try iodide, you take iodine crystals and you you 33 00:02:06,760 --> 00:02:09,000 Speaker 1: grind them up into a powder, and then you mix 34 00:02:09,120 --> 00:02:11,880 Speaker 1: that with the ammonia. And in the movie they're using 35 00:02:11,960 --> 00:02:16,440 Speaker 1: liquid iodine instead, but still those two chemicals will make 36 00:02:16,960 --> 00:02:20,240 Speaker 1: an explosive that can be pretty powerful. If you go 37 00:02:20,320 --> 00:02:22,919 Speaker 1: on YouTube, you can first of all find videos about 38 00:02:23,160 --> 00:02:25,400 Speaker 1: how people make this stuff, and you can also find 39 00:02:25,480 --> 00:02:28,720 Speaker 1: videos about how it explodes. And what you notice in 40 00:02:28,760 --> 00:02:33,960 Speaker 1: the exploding videos is that nitrogen tri iodide is incredibly 41 00:02:34,040 --> 00:02:37,839 Speaker 1: sensitive to any kind of pressure. In some videos, you'll 42 00:02:37,880 --> 00:02:40,960 Speaker 1: see them activated with just a touch of a feather 43 00:02:41,400 --> 00:02:44,120 Speaker 1: and it will explode with just that much disturbance. So 44 00:02:44,160 --> 00:02:48,079 Speaker 1: it's a very, very sensitive explosive. So the good news 45 00:02:48,240 --> 00:02:51,320 Speaker 1: is it really is possible to make a shock or 46 00:02:51,360 --> 00:02:55,880 Speaker 1: an impact sensitive explosive out of household chemicals that are 47 00:02:55,960 --> 00:02:59,720 Speaker 1: relatively easily available. But there are two problems with the 48 00:02:59,720 --> 00:03:03,239 Speaker 1: movie version that we see in Salt. First, she has 49 00:03:03,280 --> 00:03:06,079 Speaker 1: no time to dry her mixture and it wouldn't work 50 00:03:06,120 --> 00:03:09,200 Speaker 1: in the wet state that's shown in the movie. And second, 51 00:03:09,720 --> 00:03:12,040 Speaker 1: you can see and if you watch any of the 52 00:03:12,120 --> 00:03:16,320 Speaker 1: videos on YouTube, that nitrogen tri iodide is incredibly touchy. 53 00:03:16,360 --> 00:03:19,320 Speaker 1: It would definitely explode on impact, but it would probably 54 00:03:19,360 --> 00:03:22,919 Speaker 1: also explode during the launch process or the loading process 55 00:03:22,960 --> 00:03:26,480 Speaker 1: if it actually had been dry, So this might not 56 00:03:26,639 --> 00:03:29,880 Speaker 1: be the perfect thing to use for a missile as 57 00:03:29,919 --> 00:03:32,680 Speaker 1: shown in the movie. Now we can ask a second 58 00:03:32,800 --> 00:03:38,160 Speaker 1: bonus question, would Evelyn Salt actually have any hearing left 59 00:03:38,640 --> 00:03:42,360 Speaker 1: after a career of being a spy? As shown in 60 00:03:42,360 --> 00:03:45,720 Speaker 1: this movie, the explosion that she creates with nitrogen tri 61 00:03:45,880 --> 00:03:49,840 Speaker 1: iodide is just the first of many many explosions and 62 00:03:50,280 --> 00:03:54,800 Speaker 1: gunshots that her ears have to endure. She's in an apartment, 63 00:03:54,840 --> 00:03:57,640 Speaker 1: a small apartment, her small apartment when they throw a 64 00:03:57,720 --> 00:04:00,880 Speaker 1: flashband grenade in, and that grenade is powerful enough to 65 00:04:00,920 --> 00:04:03,680 Speaker 1: blow out the windows, so it certainly would have done 66 00:04:03,720 --> 00:04:07,360 Speaker 1: something to her ear drums. She's in a steel ship 67 00:04:07,400 --> 00:04:12,080 Speaker 1: where she dropped several grenades in close proximity to her ears. 68 00:04:12,160 --> 00:04:15,120 Speaker 1: That would be another set of explosions that would have 69 00:04:15,120 --> 00:04:18,839 Speaker 1: an effect on her hearing. She's in car accidents. She's 70 00:04:19,000 --> 00:04:23,760 Speaker 1: in a stone tunnel when she sets off an explosion 71 00:04:23,800 --> 00:04:26,920 Speaker 1: that's enough to take out the whole floor of a cathedral. 72 00:04:27,880 --> 00:04:31,960 Speaker 1: She stands in front of a bulletproof glass window and 73 00:04:32,240 --> 00:04:36,599 Speaker 1: shoots a whole handgun magazine and then a machine gun 74 00:04:36,680 --> 00:04:40,559 Speaker 1: magazine at it. She would probably, in fact, she would 75 00:04:40,600 --> 00:04:45,040 Speaker 1: certainly be deaf if this is her normal lifestyle, because 76 00:04:45,320 --> 00:04:47,360 Speaker 1: the ears can only take so much of this kind 77 00:04:47,360 --> 00:04:50,200 Speaker 1: of punishment before either you blow out the ear drums 78 00:04:50,400 --> 00:04:54,760 Speaker 1: or you just completely deadened their sensitivity to sound. So 79 00:04:55,440 --> 00:04:57,920 Speaker 1: we would probably if this were a real movie, see 80 00:04:57,960 --> 00:05:01,640 Speaker 1: a woman who's constantly replaced the batteries and her hearing aids, 81 00:05:01,880 --> 00:05:05,320 Speaker 1: or who is using sign language instead of speaking. If 82 00:05:05,320 --> 00:05:07,080 Speaker 1: you'd like to see some of the videos I talked 83 00:05:07,120 --> 00:05:09,359 Speaker 1: about in this podcast, you can go to Google and 84 00:05:09,400 --> 00:05:13,839 Speaker 1: type in brain Stuff Evelyn Salt, and it'll take you 85 00:05:13,960 --> 00:05:16,920 Speaker 1: right to the blog posts I did that contains the videos. 86 00:05:19,480 --> 00:05:22,080 Speaker 1: Be sure to check out our new video podcast, Stuff 87 00:05:22,120 --> 00:05:24,760 Speaker 1: from the Future. Join How Stuff Work staff as we 88 00:05:24,800 --> 00:05:29,880 Speaker 1: explore the most promising and perplexing possibilities of tomorrow. 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