At this point in time (2012) Iran is believed to have no nuclear weapons capability at all. However this could end at any time (at which point Iran would be nuclear weapons capable).
No, the Philippines does not have nuclear weapons or a nuclear weapons program. The country is a signatory to the Treaty on the Non-Proliferation of Nuclear Weapons and has consistently emphasized its commitment to nuclear disarmament and non-proliferation.
Bangladesh has never done any nuclear weapons tests. Pakistan and India usually test above ground to intimidate each other.
Japan has the technological capability to develop nuclear weapons quickly, but it has chosen not to do so due to its commitment to a non-nuclear policy.
In the most basic sense, proliferation of nuclear weapons is the spread of nuclear weapons and weapons usable technology in the world. In a much broader sense, it refers to the acquiring of capability to produce nuclear weapons, or weapons-grade nuclear material (high-enriched uranium, plutonium) by states previously not possessing them.
Does the U.S. have nuclear weapons? Yes there are five countries that obtained nuclear weapons in the aftermath of the Second World War: U.S., Great Britain, Russia, China, and France. These five signed the Nuclear Non-Proliferation Treaty to stop the expand of nuclear weapons. In the '70s both India and Pakistan began acquiring nuclear capability. North Korea, Iran, and Israel are controversial countries that are unkown for having yet obtained, but having hinted, at control of nuclear capability. I say nobody should have them.
Nuclear weapons are typically created and declared by countries that have developed the capability to produce them. Declarations of possessing nuclear weapons are often made by official government leaders or through public statements from a country's nuclear program authorities.
Israel is the only nation in the Middle East known to have nuclear weapons.
Thailand has no nucleur capability - it signed the non-proliferation treaty. It has warships, tanks, jet planes and armed services.
The two countries had the capability to make nuclear weapons. --toRk:)
Nuclear weapons' yield is derived primarily from fission. Thermonuclear weapon's yield is derived mainly from fusion. Thermonuclear weapons are multistage weapons -- x-rays from a nuclear primary trigger are used to trigger ablation in the pusher of the secondary to compress it, which is responsible for the fusion reaction.
America is opposed to Iran having nuclear weapons because we see their country as unstable and if they were allowed to have nuclear weapon capability they would either use it against us or sell them to radical terrorist group. At least that's what we believe.