when we hear from for example a connecticut senator chris murphy milwaukeeing abo talking about how guns are concerned in violence. >> a muted response from. the more recent one he asked, when will we get tough, smart and vigilant. in the past used it to get into national security. if you are just joining us as come up on the top of the hour. the united states of america has now experienced the worst mass shooting in its history. at least 50 people are dead, so. it took place at pulse nightclub in orlando, a popular gay nightclub. the shooting began at about 2:00 local time, eventually three hours later at 5:00 or sometime thereafter a gun fight ensued when the s.w.a.t. team stormed the shooter. the gunman has been identified as omar mateen born in 1986 in new york. lived in port st. lucie, florida. authorities are investigating whether or not he had radical influences. officials do say this is being investigated as a domestic act of terror. pete williams has been all over this story for us this morning. pete, i understand you have some new information. >> well, a couple of things, willi