r atel serwer, professo johns hopkins has used on the fighting in iraq and afghanistan.and the hill environment reporter timothy cama talks about the passage of the chemical safety act, the first overhaul of the safety standards in four decades. as always we will take your calls and begin joining the conversation on facebook and twitter. washington journal is next. host: good morning. topping the headlines, president obama's historic trip to japan. in a speech yesterday marking the first time a president visited the site of the attack, president obama rumored those who died a call for a change in the international mindset about war. he made clear he was not offering an apology. the end of may means college graduation ceremonies are taking place. many drawings high-profile commencement