Animated history of the US. Of course the cartoon is highly oversimplified, and most critics consider it one of the weakest parts of the film. But it makes a valid claim which you ignore entirely: That the strategy to promote "gun rights" for white people and to outlaw gun possession by black people was a way to uphold racism without letting an openly terrorist organization like the KKK flourish. Did the 19th century NRA in the southern states promote gun rights for black people? I highly doubt it. But if they didn't, one of their functions was to continue the racism of the KKK. This is the key message of this part of the animation, which is again being ignored by its critics. Buell shooting in Flint. You write: "Fact: The little boy was the class thug, already suspended from school for stabbing another kid with a pencil, and had fought with Kayla the day before". This characterization of a six-year-old as a pencil-stabbing thug is exactly the kind of hysteria that Moore's film warns against. It is the typical right-wing reaction which looks for simple answers that do not contradict the Republican mindset. The kid was a little bastard, and the parents were involved in drugs -- case closed. But why do people deal with drugs? Because it's so much fun to do so? It is by now well documented that the CIA tolerated crack sales in US cities to fund the operation of South American "contras" It is equally well known that the so-called "war on drugs" begun under the Nixon administration is a failure which has cost hundreds of billions and made America the world leader in prison population (both in relative and absolute numbers).

Under whose administration did the war on drugs begin and was the focus of the film.

Earths magnetic field helps protect Earth and its organisms. It protects us from harmful particles given off by the sun. Most of the particles are attracted to the north and south magnetic poles. This is where Earths magnetic field is strongest. This is also where relatively few organisms live. Another benefit of Earths magnetic field is its use for navigation. People use compasses to detect Earths magnetic north pole. Knowing this helps them tell direction. Many animals have natural 'compasses' that work just as well. Birds like the garden warbler in Figure 1.36 use Earths magnetic field. They use it to guide their annual migrations. Recent research suggests that warblers and other migrating birds have structures in their eyes. These structures let them see Earths magnetic field as a visual pattern.

How do garden warblers use the earth's magnetic field to guide animal migration?

Sometimes a full Moon moves through Earths shadow. This is a lunar eclipse . During a total lunar eclipse, the Moon travels completely in Earths umbra. During a partial lunar eclipse, only a portion of the Moon enters Earths umbra. When the Moon passes through Earths penumbra, it is a penumbral eclipse. Since Earths shadow is large, a lunar eclipse lasts for hours. Anyone with a view of the Moon can see a lunar eclipse. So unlike a solar eclipse, it doesnt get dark on Earth. Instead it gets dark on the Moon. Partial lunar eclipses occur at least twice a year, but total lunar eclipses are less common. The Moon glows with a dull red coloring during a total lunar eclipse.
What is the difference between a lunar eclipse and a penumbral eclipse?