Main Idea

Read the following passage and answer the questions, based on what is stated or implied in the passage: Declassification of government documents has shed new light on the events comprising the Cuban Missile Crisis of October 1962. Prior to the accessibility of these records, the only source of account of the Crisis for scholars and historians were the personal memoirs and narratives of the officials who served under Kennedy and Krushchev during this period. Many of declassified documents are transcriptions and notes of meetings between members of the CIA and President Kennedy's Cabinet, as well as the President himself. The revelations in these documents have demonstrated the inadvertent inaccuracies and intended obscurities inherent in the first person narratives of the Crisis, and has aided historians from all three countries involved in the Crisis to get a more authentic representation of what truly transpired, and for what reasons. Of perhaps the most interest to historians are declassified correspondence between John F. Kennedy and Nikita Krushchev that challenge the idea that the height of the Crisis extended only over the course of thirteen days. Indeed, these letters indicate that the Crisis was far from resolved by Khrushchev's October 28 decision to withdraw the Soviet Missiles from Cuba; instead it endured far into the following month, while slept fitfully under the illusion of peace.

The Author is mainly concerned with

A recent experimental study showed for the first time that pulmonary exposure to the Particulate Matter (PM) within diesel exhaust enhances atherogenesis. The human blood vessel endothelium is a sensitive target for air pollutants. The interactions of the inflammation and coagulation systerms are of the main mechanisms involved in impairment of endothelial function and eventually cardiovascular diseases. The effect of air pollution on inflammation, oxidative stress and cardiovascular risk factors has been demonstrated not only in older adults, but also in young adults as well as in children and adolescents. The inflammation process stimulates the coagulation system and result in increased secrection of Tissue Factor (TF). Endothelial function has key roles in anticoagulant and fibrinolytic systems. In vitro studies have demonstrated significant decrease in endogenous anticoagulation activity, Thrombo Modulin (TM), endothelial protein C receptor antigen and culture of endothelial cells during the inflammation process. A growing body of evidence suggests that the effects of air pollution on the inflammation and the coagulation systems may have a role in endothelial dysfunction and in turn in the progression of cardiovascular diseases. Findings of experimental studies suggest that exposure to air pollution may result in increase in TF and decrease in TM. Atherogenesis starts from the fetal life through interrelations of traditional risk factors with inflammatory, immune and endothelial biomarkers. Air pollution has various harmful effects on this process from early life. Studying the effects of environmental factors on early stages of atherosclerosis in early life can help identify the underlying mechanisms.

Which is the central syndrome talked about in the paragraph?

Anthropologists have placed together the little they known about the history of left handedness and right hand handedness from indirect evidence. Though early men and women did not leave written record, they did leave tool bones and picture. Stone Age hand axes and hatches made from stone that were carefully chipped away made to from sharp cutting edges. In some , the pattern of chipping shows that these tools and weapons were made by right handed people,designed to fit comfortably into a right hand. Other Stone Age implement were made by or for left hander, Prehistoric pictures, painted on walls of caves, provider further clues to the handedness of ancient people. A righthander finds it easier to draw faces of people and animals facing towards the left whereas s a lefthander finds it easier to draw faces towards the right. Both kind of face have been found in ancient painting. On the whole, the evidence seems to indicate that prehistoric people were either ambidextrous or about equally likely to be left or right handed. But in the Bronze Age. The picture changed The tool and weapon found from that Period are mostly made for right handed use .The predominance of right handednes among humans today and apparently already been established.

What is the main idea conveyed through the passage?