boston strong with massachusetts senator mo cowan. and then new details amid concerns feds missed an early warning about one of the suspects. a conversation with the chairman of the house security committee michael mike mccaul. lindsey gram and chuck schumer with the difference on between a terrorist and criminal and whether boston changes the immigration debate. and when the unimaginable becomes real. >> why did young men who grew up and studied here as part of our communities and our country resort to such violence? how did they plan and carry out these attacks? and did they receive any help? >> our all-star panel on what we know about the suspects and what it tells us about their mission. i'm candy crowley. this is "state of the union." federal terrorism charges could be filed as early as today against the second boston marathon bombing suspect. dzhokhar tsarnaev remains hospitalized this morning with injuries including one to his throat. "new york times" is reporting that the department of homeland security decided in recent month

>> can we quickly note that when mo cowan cedes the seat we'll go back to only one african-american in. throw that in there. deval patrick, i wish he would return, that's pathetic. >> one of the things that struck me about elizabeth colbert busch, she was tough. she was unapologetic about supporting marriage equality, being pro choice and supporting background checks. that seemed to me to be a bit of a sea change in terms of south carolina politics. >> look, i don't know necessarily that that's representative or means much in the way of a changing demographic here in south carolina. i just think this has to do with mark sanford, quite frankly. but look, colbert busch hit on something we saw in the polling in the presidential, working across the aisle on all the dials ticked off. everyone wants to see that the problem with someone like sanford is he couldn't even work within his own party. hugely republican legislature, 400, 300 vetoes overridden in minutes. he has a problem with that type of language. he can't talk to that. she did a pretty good job talking about working across the ais

. >> brown: inside, prominent politicians, including massachusetts senators elizabeth warren and mo cowan former governor and presidential candidate mitt romney, joined in honoring the bombing victims. mayor thomas menino, who missed the marathon because of a broken leg, praised boston for its strength in the face of the tragedy. >> nothing can defeat the heart of this city. nothing. nothing will take us down because we take care of one another. even with the smell of the smoke in air and blood on the streets, tears in our eyes, we triumphed over that hateful act on monday afternoon. because this is boston. a city with courage compassion and strength that knows no bounds. >> brown: six religious leaders spoke. reverend nancy taylor of boston's old south church, located near the race's finish line, recounted the sacrifice she witnessed monday. >> from church's tower, this is what i saw that day. i saw people run toward not away, toward the explosion. toward chaos. the mayhem, toward the danger. making of their own bodies sacraments of mercy. >> suarez: violinist yo-yo ma accompanied the bo