Because Mexico as well as the lost territories (including California or Texas) is a resource-rich country, with several minerals and pasture land.
The United States became more deeply involved in Vietnam in the late 1960s.
Answer:
A newspaper, article, video or any other media created by medical institutions or health professionals.
Explanation:
A source with bias-free information about second-hand smoke and the danger it can cause children with asthma, can only be a source made by healthcare professionals. This is because these professionals or institutions will be able to provide relevant, accurate and rational information that will really inform the reader with concrete facts about passable smoking and the danger for people with asthma.