A lot of Americans in Baghdad now are desperately reviewing their personal security, especially after Sunday’s attacks on the al Rashid Hotel and Monday’s half-hour rampage of six suicide car bombings around the city. If even Paul Wolfowitz isn’t safe (his room was only one floor away from taking a direct hit from a rocket), then who is? Here’s a primer for those who really must go. GETTING THERE If you don’t have a military flight, or a seat on a military convoy, then there are four main ways in to Iraq, all of them bad. You can drive up...