Life moves fast. News moves faster. Four children and their bus driver were killed Tuesday when a gunman opened fire on their bus in Peshawar, Pakistan. The first weapon, a rocket-fired grenade, missed its target but subsequent use of AK-47 assault rifles killed five and sent another 18, including 15 children, to the hospital. Pakistan’s Taliban militants carried out the attack, perhaps in response to Osama bin Laden’s killing earlier this year.