WORLD HISTORY

Detailed explanation-1: -According to official U.S. assessments, Iran halted its nuclear weapons program in late 2003 and has not resumed it. This program’s goal, according to U.S. officials, was to develop an implosion-style nuclear weapon for Iran’s Shahab-3 ballistic missile.

Detailed explanation-2: -For months, nonproliferation experts have suggested Iran had enough uranium enriched up to 60 percent to build at least one nuclear weapon-though Tehran long has insisted its program is for peaceful purposes.

Detailed explanation-3: -Iranian development of nuclear technology began in the 1970s, when the U.S. Atoms for Peace program began providing assistance to Iran, which was then led by the Shah. Iran signed the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) in 1968 as a non-nuclear weapons state and ratified the NPT in 1970.

Detailed explanation-4: -UN report says uranium particles enriched up to 83.7 percent found in Iran. VIENNA (AP)-Inspectors from the United Nations nuclear watchdog found uranium particles enriched up to 83.7 percent in Iran’s underground Fordo nuclear site, a report seen Tuesday by The Associated Press said.