Tulsi Gabbard said her husband had recently been diagnosed with a rare form of bone cancer and “faces major challenges in the coming weeks and months.” She is the fourth Cabinet official to depart during Trump’s second term.

The firings came after Laura Loomer, the far-right activist who once claimed 9/11 was an inside job, urged President Donald Trump during a Wednesday meeting to get rid of several members of his National Security Council staff.

It’s 2016 and we’re still three metaphorical minutes away from global doom. The Bulletin of the Atomic Scientists say global warming and nuclear weapon proliferation pose serious threats to mankind.

Experts from the American Security Project are in Chicago to sound the alarm that inaction on climate change weakens the United States' national security position. We'll talk with retired U.S. Navy Vice Admiral Lee Gunn and Andrew Holland, senior fellow with the American Security Project and a former aide to ex-Secretary of Defense Chuck Hagel during Hagel's time in the Senate.

What does climate change and national security have to do with each other?  Everything according to science and military experts. We take a closer look on Tuesday’s Scientific Chicago.

With the inauguration over, where do we go from here? A panel of experts joins us to discuss what to expect during President Obama's second term.