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Sen. Edward Markey (D-MA) (R) speaks while flanked by Sen. David Vitter (R-LA) (L) Sen. James Inhoof (R-OK) (2ndL) Bonnie Lautenberg (C), widow of former Senator Frank Lautenberg (D-NJ), and Sen. Tom Udhall (D-NM) (2ndR), during a news conference on dangerous chemicals, on Capitol Hill October 6, 2015 in Washington, DC.

Sen. Edward Markey (D-MA) (R) speaks while flanked by Sen. David Vitter (R-LA) (L) Sen. James Inhoof (R-OK) (2ndL) Bonnie Lautenberg (C), widow of former Senator Frank Lautenberg (D-NJ), and Sen. Tom Udhall (D-NM) (2ndR), during a news conference on dangerous chemicals, on Capitol Hill October 6, 2015 in Washington, DC.

Thursday, May 26 10 a.m. (ET)

Congress Moves To Overhaul A 40-Year-Old Law That Regulates Toxic Chemicals

Congress is updating a 40-year-old federal law regulating thousands of chemicals in daily use. The bipartisan bill has support from many industry groups and public health advocates, but some in the environmental community say it doesn't go far enough. A look at regulating the safety of chemicals.

Flames rise off Highway 63 on May 7 outside Fort McMurray, where raging forest fires forced more than 88,000 from their homes.

Flames rise off Highway 63 on May 7 outside Fort McMurray, where raging forest fires forced more than 88,000 from their homes.

Thursday, May 26 11 a.m. (ET)

Environmental Outlook: Wildfires, Climate Change And Boreal Forests

A massive forest fire has been raging in Alberta, Canada, for nearly a month. Scientists say warmer, drier weather has increased the frequency and intensity of fires. For this month's Environmental Outlook: wildfires, climate change and threats to North America’s forests.

Most Recent
Governor John Hickenlooper in Colorado’s Rocky Mountain National Park on its 100th birthday.

Governor John Hickenlooper in Colorado’s Rocky Mountain National Park on its 100th birthday.

Wednesday, May 25 11 a.m. (ET)

Governor John Hickenlooper: “The Opposite of Woe”

The governor of Colorado on how he went from geologist and beer brewer to politician. A conversation about his approach to policies on capital punishment, fracking, and business in a swing state, and speculation that he might be tapped to be a Democratic vice presidential running mate.

Passengers at O'Hare International Airport wait in line to be screened at a Transportation Security Administration (TSA) checkpoint on May 16 in Chicago, Illinois.

Passengers at O'Hare International Airport wait in line to be screened at a Transportation Security Administration (TSA) checkpoint on May 16 in Chicago, Illinois.

Wednesday, May 25 10 a.m. (ET)

The Shake-Up At TSA: An Update On Airport Security

The Transportation Security Administration is under fire for long, slow airport screening lines and allegations of mismanagement. The latest on airport security at home, the shakeup at the TSA and the investigation into the EgyptAir crash.

Christine Levinson (C) arrives in Tehran's Imam Khomeini airport with her son Daniel to meet with Iranian officials in December 2007, the year her husband Robert Levinson disappeared in Iran.

Christine Levinson (C) arrives in Tehran's Imam Khomeini airport with her son Daniel to meet with Iranian officials in December 2007, the year her husband Robert Levinson disappeared in Iran.

Tuesday, May 24 11 a.m. (ET)

Barry Meier: “Missing Man”

Nine years ago, former FBI agent Robert Levinson disappeared in Iran while on a mission for the CIA. The story of his secret journey to Iran, the CIA cover-up that followed and efforts to rescue the longest-held U.S. hostage.

U.S. President Barack Obama (C) walks with his Vietnamese counterpart Tran Dai Quang (L) as they review a guard of honour during a welcoming ceremony at the Presidential Palace in Hanoi on May 23.

U.S. President Barack Obama (C) walks with his Vietnamese counterpart Tran Dai Quang (L) as they review a guard of honour during a welcoming ceremony at the Presidential Palace in Hanoi on May 23.

Tuesday, May 24 10 a.m. (ET)

The U.S. Expands Ties To Vietnam

President Barack Obama lifts the embargo against U.S. arms sales to Vietnam. We discuss what closer ties between the U.S. and Vietnam mean for trade, leverage on human rights and growing concerns over China's military expansion.

From left: Donald Trump (R), Former Secretary of State Hillary Clinton (D) and Vermont Sen. Bernie Sanders (I)  are the three remaining candidates in the 2016 presidential race.

From left: Donald Trump (R), Former Secretary of State Hillary Clinton (D) and Vermont Sen. Bernie Sanders (I) are the three remaining candidates in the 2016 presidential race.

Monday, May 23 10 a.m. (ET)

Where The Presidential Candidates Stand On Key Issues

Now that only three major candidates remain in the 2016 race for the White House, attention turns to the details of their policy proposals. Where the presidential candidates stand on key issues like job creation, healthcare, taxes and education.