First News with Jimmy Cefalo

ABC News Correspondent Stephanie Ramos at the White House.

ABC News Political Director, Rick Klein *Follow him on Twitter: @RickKlein. Before the president attends that hugely important and potentially history-making summit in Singapore, he has to face some less-than-happy allies at G7.

Dr. James Webb, Professor of Physics & Director, Stocker AstroScience Center at FIU, with reaction to the NASA announcement about the discovery of “organic matter” on Mars.

The Director of the Miami-Dade Police Department, Juan Perez *Follow him on Twitter: @JPerezMDPD

WIOD Natl Correspondent, Michael Bower *Follow him on Twitter: @TheBowerShow, on what NASA has found on Mars,

WIOD National Correspondent, Bill Zimpfer

CBS News & 610 WIOD Travel Editor, Peter Greenberg. *Follow him on Twitter: @PeterSGreenberg

Former CNN, Fox News and MSNBC Host Greta Van Susteren. Her latest book is; Everything You Need to Know about Social Media (Without Having to Call a Kid). She also has a new weekly show called "Plugged in with Greta Van Susteren" on Voice of America *Follow her on Twitter: @Greta

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

Marc Caputo, POLITICO’s Florida Political Reporter *Follow him on Twitter: @MarcACaputo