why do many countries are using weapons of mass of destruction?
481981
Because they don't trust each other.
723494
It is because America used nuclear weapons and everyone realized the devestation that people are reluctant to use them.\n\nIt is the same reason chemical and germ warfare are considered as evil.  Both sides used it in WW I.  Why don't we take those weapons away from the Europeans, the Chinese, the Japanese, the Iraqi's and Iranians, just to name a few.
375930
as a matter of fact, the US indeed have arsenals for nuclear bombs. The US Gov't has to maintain nuclear bombs, simply because, it wanted to stay as the world's most powerful and influential nation.
48208
becausev it would take away from the U,s, status as the only super power . the us wouldnt be the baddest kid on the block if other countries also had these kinds of weapons .
96831
Because the nations who are allowed to have them will only use them for defense(for themselves or  other, weaker countries) and China, Iran, Iraq, etc. are aggressive towards other nations. \nFor those of you who are going to argue that the US invaded Afghanistan and Iraq, we didn't do it to conquer and rule them. We invaded because they were ruled by evil, dangerous dictaters comperable to Hitler in their cruelty and threat to all civilized countries. And, even though we did attack them, we didn't use nukes. In short, we can be trusted with them, and the others can't.
774531
A nuclear weapon is a weapon which derives its destructive force from nuclear reactions of fission or fusion. As a result, even a nuclear weapon with a relatively small yield is significantly more powerful than the largest conventional explosives, and a single weapon is capable of destroying an entire city.\n\nIn the history of warfare, nuclear weapons have been used only twice, both during the closing days of World War II. The first event occurred on the morning of August 6, 1945, when the United States dropped a uranium gun-type device code-named "Little Boy" on the Japanese city of Hiroshima. The second event occurred three days later when a plutonium implosion-type device code-named "Fat Man" was dropped on the city of Nagasaki. The use of these weapons, which resulted in the immediate deaths of around 100,000 to 200,000 individuals and even more over time, was and remains controversial — critics around the world charged that they were unnecessary acts of mass killing, while others claimed that they ultimately reduced casualties on both sides by hastening the end of the war. This topic has seen increased debate recently in the wake of increased terrorism involving killings of civilians by both state and non-state players, with parties claiming that the end justifies the means (see Atomic bombings of Hiroshima and Nagasaki for a full discussion).\n\nSince the Hiroshima and Nagasaki bombings, nuclear weapons have been detonated on over two thousand occasions for testing and demonstration purposes. The only countries known to have detonated such weapons are (chronologically) the United States, Soviet Union, United Kingdom, France, People's Republic of China, India, Pakistan, and North Korea. Various other countries may hold nuclear weapons but have never publicly admitted possession, or their claims to possession have not been verified. For example, Israel has modern airborne delivery systems and appears to have an extensive nuclear program with hundreds of warheads (see Israel and weapons of mass destruction), though it officially maintains a policy of "ambiguity" with respect to its actual possession of nuclear weapons. Iran currently stands accused by a number of governments of attempting to develop nuclear capabilities, though its government claims that its acknowledged nuclear activities, such as uranium enrichment, are for peaceful purposes. South Africa also secretly developed a small nuclear arsenal, but disassembled it in the early 1990s. (For more information see List of countries with nuclear weapons.)\n\nApart from their use as weapons, nuclear explosives have been tested and used for various non-military uses.
1029826
You'd have to ask North Korea and Iran - they're the only countries that seem to like to threaten the world. The rest of the countries have matured beyond that and have been dismantling their arsenals for a decade.
489089
Its basically a deterrant to keep other nations from using them.  So say for example, Iran nukes Israel, then the other club members would be required to obliterate all of Iran as punishment.  Even in the afghanistan mountains, the US only used conventional bombs and not nukes.
1014049
I totally agree with you. Why can the US have nuclear bombs and wmd and we do have them. Why cant other countries. Its none of our business. Read the constitution we are not to go to war with any other country unless that country attacks us. But what do we do we invade countries that have disputes with other countries and stick our big fat noses into everything. No wonder America is a HATED country.
856925
The Harpoon is an anti ship missile, fired from; let's say an F-16. The Tomahawk is capable of destroying entire buildings and is even capable of carrying a nuclear warhead (never used before). But there could be more out there in the non US defence market, we never know. The Russians and the Chinese have some neat stuff. Peace to the world.
1086575
I feel uncomfortable with any nation having nuclear weapons.  If you are refering to general technology, such as power plants, then not necessarily, because there are a lot of countries without democratically elected governments that have nuclear technology.  It does not matter who has the technology, its how they use it that is important.
602659
This is not a very smart question to be asking given the War on Terrorism we are involved in around the world.  There are at least 6 Nuclear Powers in the world that I know of, the US, UK, Russia, Israel, China, and France, nations which have or are capable right now in building and delivering by missile or briefcase, to a designated target.  There are at least 5 more working hard to enrich uranium to build their bomb, having already obtained a delivery system. Our government is very jittery and gets very suspicious of people who ask the kinds of questions you did.  If you want people knocking on the door at home, your doing a fine job of attracting the kind of attention and scrutiny you do not want, trust me.  I am one of those people who watched out for people like you before I retired.  Do yourself a favor and find a new interest.
1134141
I feel they have every right to self defense just as any other country in the world.  Remember, the US isn't one to police the world in terms of nukes.  The US is the only country that has ever used it as a weapon in war time. No other country has.  The US is just another landmass on the map.  If one country can have mass killing weapons, then everyone else has the right to defend themselves as well.
1100759
No one should have Neclear Weapons.  If one blew up anywhere in the world it would affect every country.  The world as we know it would be gone.  Dangerous, dangerous things.
345673
The USA,of course.\n\nThey want no one but themselves to have weapons of mass destruction.\nThey have absolutely no respect for other goverments from countries with different cultures.\nTheres no other country that  represents a bigger threat  to they world.
778258
It is  a catch 22 situation. If you don't sell arms to others, where does your arms industry go? And if you do, there is a real danger of them ending up being used against you. For example, Pakistan has provided nuclear techonology to North Korea. Now, that it is available, it can easily fall in the hands of terrorists who can use it to make dirty bombs that will make 9/11 look like a school picnic.
35208
The Us has the largest stockpile of active nuclear material thus it is still the most dangerous nation there is, liable to use their nuclear arsenal if they deem it is rightious enough for their cause such as they had contemplated during the attack on Iraq. As for the world many countried now own nuclear arsenal such as France, Isreal, China, Russia, India, Pakistan and other countried deem to be developing nuclear capabilities such as North Korea and Iran.