Former U-S George LeMieux *Follow him on Twitter: @George_LeMieux

Dr. Mariana Budjeryn is a Ukrainian, political scientist and a nuclear expert at Harvard's Belfer Center for Science and Intl Affairs *Follow her on Twitter: @mbudjeryn. Her analysis on the latest in Ukraine, the political response from the US, whether we're seeing the beginning of a new Cold War, and whether the world should be concerned that Vladimir Putin would consider turning to nuclear weapons.

WIOD Senior National Correspondent, Michael Bower *Follow him on Twitter: @TheBowerShow. Even though America barely uses Russian oil, we are paying a fortune for gasoline.

WIOD National Correspondent Rory O'Neill *Follow him on Twitter: @RadioRory. The latest on the situation in Ukraine.

Dr Lynn Bufka is a Clinical Psychologist with the American Psychological Association *Follow her on Twitter: @drbufka

ABC News Correspondent Karen Travers at the White House *Follow her on Twitter: @karentravers

TV Guide Senior Critic, Matt Roush *Follow him on Twitter: @TVGMMattRoush

Brad Meltzer is a best-selling thriller, historical and children’s book writer as well as a TV host and South Floridian. His new novel is titled “The Lightning Rod” *Follow him on Twitter @bradmeltzer

NBC News Political Director Chuck Todd is moderator of “Meet the Press” and host of MSNBC’s MTP Daily at 1pm *Follow him on Twitter: @chucktodd

The new Interim Director of the Miami-Dade Police Department, George Perez *Follow him on Twitter: @MDPD_Director