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National MallNovember 6, 2019 7:16 pm

New Technology Uses Oxygen, Ozone to Clean Constitution Gardens Pond

After decades of neglect, the Constitution Gardens pond on the National Mall will get a much-needed cleaning. News 4’s Cory Smith explains why scientists are turning to new technology to fix a problem in the water.

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New Technology Uses Oxygen, Ozone to Clean Constitution Gardens Pond

Tariffs between US and Canada may impact DC tourism

Tariffs between US and Canada may impact DC tourism

Georgetown community walks out in support of detained researcher: The News4 Rundown

Georgetown community walks out in support of detained researcher: The News4 Rundown

Ed Burroughs elected Prince George's County Council Chair

Ed Burroughs elected Prince George's County Council Chair

‘Boys and men are in trouble': How Democrats are embracing the male vote

‘Boys and men are in trouble': How Democrats are embracing the male vote

Tommy Tries It: Inside operations at Kings Dominion's newest rollercoaster

Tommy Tries It: Inside operations at Kings Dominion's newest rollercoaster

Buy now, pay later: New way to pay for vacation can be risky

Buy now, pay later: New way to pay for vacation can be risky

Suspects tearing ATM from DC store ends in police pursuit in VA and MD

Suspects tearing ATM from DC store ends in police pursuit in VA and MD

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‘Who's Watching My Baby': Book helps parents find the best child care

Founders of DC's Corner Water tell how students inspired them

Founders of DC's Corner Water tell how students inspired them

ATM torn out of liquor store in Northwest DC in burglary

ATM torn out of liquor store in Northwest DC in burglary

Maryland Tesla showroom abruptly closes amid protests

Maryland Tesla showroom abruptly closes amid protests

Virginia gun store hit by burglars for 3rd time in 2 years: The News4 Rundown

Virginia gun store hit by burglars for 3rd time in 2 years: The News4 Rundown

Nats hold homecoming ahead of Opening Day

Nats hold homecoming ahead of Opening Day

New album carries on bluegrass legacy of Bethesda's The Seldom Scene

New album carries on bluegrass legacy of Bethesda's The Seldom Scene

Bay Bridge safety under review

Bay Bridge safety under review

Actor Paolo Montalban on starring in stage adaptation of ‘The Age of Innocence'

Actor Paolo Montalban on starring in stage adaptation of ‘The Age of Innocence'

Fairfax County gun store burglary leaves door blown off, glass scattered

Fairfax County gun store burglary leaves door blown off, glass scattered

Conan O'Brien receives Mark Twain Prize at Kennedy Center

Conan O'Brien receives Mark Twain Prize at Kennedy Center

Kite decorating, live music and more: Bloomaroo at the Wharf previews festivities

Kite decorating, live music and more: Bloomaroo at the Wharf previews festivities

Fans line up to see Nationals unveil City Connect uniforms at Nationals Park

Fans line up to see Nationals unveil City Connect uniforms at Nationals Park

DCPS students create DC-inspired mural for National Cherry Blossom Festival

DCPS students create DC-inspired mural for National Cherry Blossom Festival

Teen dead after shooting in Bowie home, police say

Teen dead after shooting in Bowie home, police say

Community gathers to look for man with Alzheimer's missing for 2 months

Community gathers to look for man with Alzheimer's missing for 2 months

Sip this cherry blossom afternoon tea at CUT by Wolfgang Puck

Sip this cherry blossom afternoon tea at CUT by Wolfgang Puck

How DC students, teachers prepare for STEM fair

How DC students, teachers prepare for STEM fair

Bethesda food pantry honors 12-year-old's life

Bethesda food pantry honors 12-year-old's life

DC's African American Civil War Museum moves into permanent home

DC's African American Civil War Museum moves into permanent home

Charles County detectives seek help solving serial rapist cold case

Charles County detectives seek help solving serial rapist cold case

Measles cases cause concern in Prince George's County

Measles cases cause concern in Prince George's County

STEM Week: Young students inspired at Virginia Tech's Alexandria campus

STEM Week: Young students inspired at Virginia Tech's Alexandria campus

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Tariffs between US and Canada may impact DC tourism

Tariffs between US and Canada may impact DC tourism

Family calls for answers after deadly shooting of 19-year-old PGPS employee

Family calls for answers after deadly shooting of 19-year-old PGPS employee

Georgetown community walks out in support of detained researcher: The News4 Rundown

Georgetown community walks out in support of detained researcher: The News4 Rundown

Here's what you need to know about colonoscopies, effectiveness of alternatives

Here's what you need to know about colonoscopies, effectiveness of alternatives

Ed Burroughs elected Prince George's County Council Chair

Ed Burroughs elected Prince George's County Council Chair

Interim US Attorney for DC speaks to Southeast residents

Interim US Attorney for DC speaks to Southeast residents

Maryland lawmakers push bill to make traffic stops safer

Maryland lawmakers push bill to make traffic stops safer

‘Boys and men are in trouble': How Democrats are embracing the male vote

‘Boys and men are in trouble': How Democrats are embracing the male vote

Tommy Tries It: Inside operations at Kings Dominion's newest rollercoaster

Tommy Tries It: Inside operations at Kings Dominion's newest rollercoaster

Georgetown students and faculty walkout in support of detained researcher

Georgetown students and faculty walkout in support of detained researcher

Waymo wants to bring self-driving rideshare cars to DC in 2026

Waymo wants to bring self-driving rideshare cars to DC in 2026

Suspects tearing ATM from DC store ends in police pursuit in VA and MD

Suspects tearing ATM from DC store ends in police pursuit in VA and MD