Self Checkout in Walmart

For many reasons, it didn't seem to make sense to put self checkout in Walmart. I see that they've removed it in most of the stores near me.

Gun Control

Obama's in the White House. O'Malley's in the State House. Both are clamoring for more restrictions on gun ownership. The prevailing belief is that guns to NOT make people safer, that instead, they make society MORE dangerous. So why is it that, for their own personal protection, these leaders never go anywhere without being accompanied by heavily armed guards?