Storylin: Uranium enrichment, as part of the natural cycle of Iran's nuclear industry, is absolutely non-negotiable, said Esmail Baghaei, spokesman of Iran's Foreign Ministry, on Monday's press briefing. Enrichment is a technology and a need to ensure that Iran's nuclear industry will continue to work without interruption. Therefore, it is both a right enjoyed by Iran under the Treaty on the Non-Proliferation of Nuclear Weapons and the result of decades of hard work and effort by Iranian scientists, which cannot be ignored under any circumstances, said Baghaei. In every negotiation session, the Iranian side feels that progress has been made and at least both sides have furthered their understanding of the other's perspectives. But unfortunately, upon their arrival at Washington, the U.S. delegation and others lost no time to voice their different positions. This has led to multiple and repeated uncertainty and made negotiation process difficult, he added. Shotlist: FILE: Tehran, Iran - October 2024: 1. National flag of Iran FILE: Tehran, Iran - April 10, 2023: 2. National flag of Iran, city view, traffic FILE: Tehran, Iran - October 2024: 3. Cityscap FILE: Tehran, Iran - April 14, 2025: 4. City view, traffi FILE: Tehran, Iran - April 10, 2023: 5. Various of traffic FILE: Tehran, Iran - April 14, 2025: 6. City view, traffic FILE: Iran - March 2024: 7. Various of Azadi Tower FILE: Tehran, Iran - April 10, 2023: 8. Various of traffic, rows of national flags of Iran by roadsides FILE: Washington D.C., USA - October 2024: 9. Various of White House 10. Various of Capitol building, U.S. national flag. [Restrictions: No access Chinese mainland/Al-Arabiya/Persian language TV Stations outside Iran. Strictly No Access BBC Persian/VOA Persian/Manoto TV/Iran International TV]