zari said:
werepossum said:
Third, Iran hates the West, especially the USA. The roadside bombs that can take out Strykers and even Abrams tanks are not made in some disgruntled Iraqi's garage; they are advanced, precisely machined shaped charge mines, many remotely triggered, designed to take out modern tanks and IFVs. Iran is furnishing those for a reason, and that reason is to stop democratization of Islamic countries. It's a cause about which Iran feels strongly enough to risk war with the West.
Your argument is a little flawed here - stating something without substantiating it doesn't make it so (just like your 'most warlike nation' assertions in your first post). You talk about disgruntled Iraqi's garages as if to imply (using nothing but your statement as basis) that that's the only option for creating IEDs and to further imply that this makes them primitive. You then use this as a basis for blaming Iran (as a nation, rather than Iranians).
I went and did a bit of reading and found a report to Congress on the IED issue [http://www.fas.org/sgp/crs/weapons/RS22330.pdf] (production, source and countermeasures), which among other things provided arguments for and against Iran backing Iraqi insurgents. It mentions one source of munitions to be materials stockpiled before the war, as well as evidence of specialized bomb-making terrorist cells being involved. While there are obvious limits to what you can make in the field, the idea that an expensive tank (and whatever you call the new 'not quite tanks' - military scholar I am not

can't be blown up by something that isn't proportionately expensive is a bit fanciful.
(I like this thread, it makes me go learn new things.)
Edit: I'd also like to have a bit of a giggle at Fondant's mention of the media and the word 'neutral' in the same sentence

You can't escape bias.
Here are some entries discussing this. There used to be a lot of soldiers' blogs which sometimes mentioned finding explosives with Farsi markings or capturing Iranian nationals. Most of these however have dried up as the military has cracked down on soldiers' blogs, especially mentions of Iran and Iranian influence, to combat intelligence leaks and accusations that the Pentagon is advocating war with Iran. Note that these stories are mostly from Iraq, as most of the US soldiers in Afghanistan are special forces and not so talkative.
http://www.longwarjournal.org/archives/2007/08/us_iraqi_forces_kill.php
http://www.nytimes.com/2007/08/08/world/middleeast/08military.html?_r=1&ei=5065&en=75efbc6c7439e7bd&ex=1187150400&partner=MYWAY&pagewanted=print&oref=slogin
http://www.cnn.com/2007/WORLD/meast/08/08/us.iran.weapons/index.html
http://www.debka.com/headline.php?hid=4424
http://edition.cnn.com/2007/WORLD/asiapcf/05/30/iran.taliban/index.html
http://www.washingtonpost.com/wp-dyn/content/article/2007/09/15/AR2007091500803.html
http://www.csmonitor.com/2007/0601/p99s01-duts.html
Here's an interesting article showing the toughness of Strykers against normal IED (improvised explosive devices.) This one was hit by two very large IED, culverts packed with explosives, that would have turned a HMMWV into unrecognized wreckage. None of the soldiers died and the Stryker was badly damaged, but not penetrated. They are extremely tough. They will not however stand up to modern EFPs.
http://www4.army.mil/ocpa/klw/winners/cata/NWG%207-20-07%20A3.pdf
Here's a couple of links about Strykers. They are basically heavily armored trucks, not really fighting vehicles for high-intensity combat.
http://www.globalsecurity.org/military/systems/ground/iav.htm
http://www.globalsecurity.org/military/systems/ground/m113-iav.htm
Here's a link on shaped charges in general. Basically a shaped charge is dishing out the charge to focus its blast effects. Lining the concave face with a thin layer of copper turns the copper into a jet of plasma or molten copper (the physics are poorly understood and not all physicists agree) which moves at extremely high speed and penetrates through its momentum like a conventional solid penetrator, or at least that's the prevailing theory. The concept is very old and well understood, but optimum design is very difficult and takes a lot of computer power and design savvy. Nonetheless, these can be built with minimal machine equipment, although the efficiency will vary with the skill of the designer and the accuracy of the construction (think ten-thousandths of an inch for American versions.) A large, well designed, conical shaped charge (like current Russian models) can penetrate a Stryker anywhere or an Abrams in a very few places. A homemade version by anyone who understands the concept can penetrate an armored HMMWV, but not a Stryker, at least in critical areas (crew and passenger compartments, fuel, engine compartment to a lesser degree.)
http://www.globalsecurity.org/military/systems/munitions/bullets2-shaped-charge.htm
Note toward the end of the article the EFP (Explosively Formed Penetrator.) In the EFP the penetrator metal is stronger than copper and is not made molten or plasma, but is shaped by the explosion into a solid penetrator moving at high speed. These fall into two very rough categories, enhanced effects and enhanced penetration. The first is a fairly flat shape or even multiple projectiles; its purpose is to inflict enhanced damage on a soft or lightly armored target. A shaped charge's plasma jet can easily penetrate an up-armored Hummer, it can just as easily pass completely through it, hitting no one and nothing critical. This kind of EFP aims to increase damage inside the target.
The second type of EFP is formed into a teardrop or other aerodynamic shape, and is designed to overcome some of the armor techniques (Chobham, DU mesh, active capacitor) that severely degrade a plasma jet's penetration. This type of EFP, if well-designed, can penetrate any armored vehicle in the world with a small (2 to 5 kg) device. The only countries capable of designing this kind of EFP are the USA, Russia, Israel, probably France and the UK, and possibly China. Iran's are relatively crude copies of Russian devices from what I've read, but Russia's are arguably the best in the world. With luck, an Iranian copy can penetrate an Abrams main battle tank, especially through the bottom or top armor. My point is that Afghan, Iraqi, or foreign terrorists cannot make these on their own. There wasn't sufficient computer power and modeling software in Iraq before the war to create such devices, and certainly not in Afghanistan.
If you wish to assert with some authority what can and cannot penetrate armor, you really need to learn more about armor and the things designed to defeat it. I'm glad to see you are at least trying to educate yourself about these things, which are really fascinating from an engineering standpoint.