Subramaniam said he found pure VX, a degraded form of the poison and a base substance used to make the poison on a t-shirt that Huong wore at the time of the attack.
During the opening statement on Monday, the prosecution said it would prove that the two women approached Jong Nam at the airport's departure hall and sprayed VX nerve agent on his eyes and face. Trump did not immediately clarify what he meant but, at the meeting, Trump pledged the USA would not allow the North Korean leader's "dictatorship to threaten our nation our allies with unimaginable loss of life". It's titled "North Korea's Deadly Dictator", and it mixes together two main narratives, one about the unimaginable weirdness of the North Korean ruling family, and the other about their recent breakthroughs toward achieving nuclear weapons capability.
The poison, which the witness said was a highly risky type of chemical weapon, was found concentrated on Kim Chol's eyes and face.
The lethality of VX depended on the dosage and where on the body it was applied, he added.
The two suspects, Siti Aisyah of Indonesia and Doan Thi Huong of Vietnam, have pleaded not guilty to murder charges that could bring the death penalty if they are convicted.
The low level "could be caused by poison such as pesticide or nerve agent", she told the court, and can cause heart and lung problems and symptoms such as profuse sweating and vomiting.
She agreed that a person with VX on the hands may not be fully decontaminated by washing it off with soap and water.
Hisyam Teh Poh Teik, Huong's lawyer, said the defense has another explanation of why VX was present on the Vietnamese and would reveal this later.
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The North Korea expert is the first major United States figure to challenge this tacit official line - and in doing so, indirectly contradict mainstream appraisals of the escalating tensions between Pyongyang and Washington.
"The possible route of entry is via skin contact, ingestion, inhalation, injection and via the eye", he told Shah Alam High Court, outside the capital of Kuala Lumpur. Pathologists testified that Kim's symptoms were consistent with VX exposure and that his internal organs showed damage from VX.
"(The North Koreans) know exactly how the situation developed in Iraq", Putin told the economic forum, saying Washington had used the false pretext that Baghdad had weapons of mass destruction to destroy the country and its leadership.
North Korea's provocations are not being taken lightly in Washington, where policymakers are weighing military options despite the potentially catastrophic consequences.
Top CIA officials said Wednesday that Kim's actions are not those of a maniacal provocateur but a "rational actor" who is motivated by clear, long-term goals that revolve around ensuring regime survival, CNN reports.
North Korean leader Kim Jong Un is believed to have considered his older sibling a potential rival for power.
Both lawyers have been hired by the respective government's of the accused: Gooi Soon Seng, by the Indonesian embassy and Hisyam Teh Poh Teik by the Vietnamese.
In the long term, Beijing would want to see a friendly government in Pyongyang to ease security concerns about a unified Korea under the protection of US and South Korean troops, against whom China fought in the 1950-53 Korean War.