pressure cooker does not mean it's definitive towards a foreign or domestic source. >> catherine. thank you. >> you're welcome. >> bret: now to the president. he gave a very short statement this morning. white house reporter wendell goler reports it was notable for one particular word. >> his second address to the american people on the boston marathon attack was the first in which president obama labeled it terrorism. >> given what we now know about what took place, the fbi is investigating it as an act of terrorism. any time bombs are used to target innocent civilians, it is an act of terror. >> of course, he knew bombs were used when he first spoke about the attack three hours after it occurred and mr. obama didn't mention terrorism then. aides say the president has been briefed regularly by senior homeland security advisors but on this day he said there is plenty we still don't know. >> who carried out this attack or why, whether it was planned and executed by a terrorist organization. foreign or domestic. or was the act of a