Read newspapers. Listen to and watch the news on TV. Buy news magazines and read them. Listen to what informed people have to say about events. Talk to your teachers. If you keep accepting rumours for your information source, you will spend more and more time feeling foolish.
Sadly no, just a tragedy that some people will use to push their politics. Read the coroners report on the type of rounds recovered, no .223 nor 5.56. They blame the M16 that later became an AR-15, & now the blame is on the assault weapons that are automatic pistols. Machine guns, no regular pistols but automatic sounds much nastier. A revolver will do the same damage, in the hands of a real shooter you'd think it was a machine gun. We had the assault ban for years, it made no difference. Once again lets ban things from law abiding citizens. Does anybody think criminals give a damn about the law? The shooting was very real, the ban will only ad fuel to the fires