US government leaders have called for tighter gun control measures in the wake of two major mass shootings in the space of two weeks. While authorities are still getting their story straight about how the atrocity unfolded at an elementary school in Uvalde, Texas, on Thursday, the government's message is that civilians need to be prevented from acquiring assault rifles. Meanwhile, no one bats an eyelid as those same authorities dump vast quantities of assault weapons into Ukraine, where it's...