warning u.s. authorities was preparing to join islamic radicals. >> but i do -- when i hear them say it... and i hear from our own people what a game changer this is in information sharing that... unfortunately, i think that there might have been a different result. no one can say that for certain. the house homeland security commission and says that boston fbi officials have yet to participate in open hearings. but russian authorities revealed to keating that the 27-year-old friend of tamerian tsarnaev who was killed by an fbi agent under questioning in florida last month, was mentioned inetk6x intelligence exchanges between the u.s. and russia, along with other russian nationals, nearly a week after the bombing. keating met with russian intelligence officials over an hour and they have offered a high level of cooperation and have thus far shared more