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CNN's Laurie Segall explains what 3-D printing is and why it matters.

Finance

'Fiscal cliff'
'Fiscal cliff'
Unemployment rate
Unemployment rate
IPOs
IPOs
Gold
Gold
Tax day
Tax day
Payroll tax cuts
Payroll tax cuts
Central banks
Central banks

Science / Technology

3-D printing
3-D printing
Ricin
Ricin
TED
TED
Drones
Drones
Cell phones and radiation
Cell phones and radiation
Commercial space flight
Commercial space flight
Fracking
Fracking
SOPA
SOPA

World

Falkland Islands
Falkland Islands
The Royal Wedding
The Royal Wedding
UK tabloid scandal
UK tabloid scandal
Iran
Iran
North Korea
North Korea
Eurozone deal
Eurozone deal
Iraq pullout
Iraq pullout
Modernizing a monarchy
Modernizing a monarchy

Politics

Presidential libraries
Presidential libraries
The 2nd Amendment
The 2nd Amendment
The State of the Union
The State of the Union
Secession
Secession
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Campaign spending
How candidates raise $
How candidates raise $
Pardons
Pardons
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Running for president
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Presidential campaigns
Early voting states
Early voting states

Health

Health care reform
Health care reform
Concussions
Concussions
Fertility
Fertility
Addiction
Addiction

Weather

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Nor'easters
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Tropical cyclones
Tornadoes
Tornadoes

Sports

The Masters
The Masters
March Madness
March Madness
Spring training
Spring training
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Tour de France

Religion

Papal succession
Papal succession
Ramadan
Ramadan
Mormonism
Mormonism
John 3:16
John 3:16

Pop Culture

New York Fashion Week
New York Fashion Week