Alaska Clash Over Resources and Rights Heats Up

By WILLIAM YARDLEY

Clockwise from top left, M. Scott Moon/Peninsula Clarion, via AP; Subhankar Banerjee/AP; Michael Cameron/N.O.A.A., via AP; Steve Quinn/AP

Alaska is involved in legal battles with various federal agencies concerning salmon, polar bears, ribbon seals and wolves.

Gov. Sean Parnell has taken on federal restrictions on oil drilling, building roads and mining precious metals.

Froot Loops, Kraft macaroni and cheese, and Jell-O all contain artificial food colorings.

F.D.A. Panel to Consider Warnings for Artificial Food Colorings

By GARDINER HARRIS

Studies suggest a link between food dyes and hyperactivity in children.

William Cronon, a history professor at the University of Wisconsin in Madison.

Group Seeks Labor E-Mails by Michigan Professors

By STEVEN GREENHOUSE

A conservative group issued a public records request of the labor studies departments at three public universities.

Foreclosure Aid Fell Short, and Is Fading

By MICHAEL POWELL and ANDREW MARTIN

Administration efforts have failed to stanch a rising tide of foreclosures and a decline in home prices.

Revised Bill on Collective Bargaining Advances in Ohio

By EMMA G. FITZSIMMONS

Ohio moved closer to completing legislation to limit collective bargaining rights for public-sector workers on Tuesday while legislation in Wisconsin continued to be tied up in the courts.

Henry Velandia, left, and Josh Vandiver in Princeton, N.J. , were married in Connecticut.

Confusion Over Policy on Married Gay Immigrants

By JULIA PRESTON

An announcement on Monday led to soaring hopes, but Tuesday, the government said it had not made changes that would provide an opening to same-sex couples.

Schools Under Pressure to Spare the Rod Forever

By DAN FROSCH

Corporal punishment has been on the decline in American schools, but it remains acceptable in 20 states.

Budget Talks in California Break Down

By ADAM NAGOURNEY

Negotiations between California Republican leaders and Gov. Jerry Brown on a package to close the state’s huge budget deficit collapsed Tuesday with each side accusing the other of intransigence.

Finally, California Finds a Surplus: 50 Feet of Snow

$14 Million Jury Award to Ex-Inmate Is Dismissed

By ADAM LIPTAK

In a 5-to-4 ruling Tuesday, the Supreme Court threw out the award in favor of a former death row inmate who was freed after prosecutorial misconduct came to light.

Obama Returns to Harlem for a Lucrative Fund-Raiser

By JACKIE CALMES

In his first visit to Harlem as president, Barack Obama attended a $30,800-a-person fund-raiser.

Recent Series

Race Remixed

By SUSAN SAULNY

Articles in this series explore the growing number of mixed-race Americans.

Drilling Down

By IAN URBINA

The Drilling Down series examines the risks of natural-gas drilling and efforts to regulate this rapidly growing industry.

A Year at War

By JAMES DAO

This series follows the deployment of one battalion in the northern Afghanistan surge, chronicling the impact of war on individual soldiers and their families back home.

The Radiation Boom

By WALT BOGDANICH

Articles in this series examine issues arising from the increasing use of medical radiation and the new technologies that deliver it.

Multimedia

Interactive Feature: The Victims of the Shooting

Retirees, a federal judge and a 9-year-old girl born on 9/11 were among those killed when a gunman opened fire outside a supermarket in Tucson on Saturday, Jan. 8.

Interactive Feature: How the Rig Crew Responded to the Blowout

Video and diagram showing the final moments of the Deepwater Horizon oil rig.

Interactive Map: Every City, Every Block

Browse data from the Census Bureau’s American Community Survey, based on samples from 2005 to 2009.

Interactive Feature: Faces of the Dead

As we mark the seventh anniversary of the U.S.-led invasion of Iraq, we remember the fallen service members who lost their lives in Iraq and Afghanistan.

U.S. Headlines

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Budget Fight Faces Hurdle Beyond Price Tag

By JENNIFER STEINHAUER

Increasingly, contentious policy issues that House Republicans insist must be addressed in any budget deal are as much of a stumbling block as the final dollar figure.

News Analysis

Doctrine for Libya: Not Carved in Stone

By THOM SHANKER and HELENE COOPER

Concerning the assault on Libya, President Obama offered the most detailed portrait of when he might commit the country’s military might in a tumultuous world.

Washington in Fierce Debate on Arming Libyan Rebels

By MARK LANDLER, ELISABETH BUMILLER and STEVEN LEE MYERS

Fears that providing arms would pull the United States into a civil war, as well as concerns that some fighters may have links to Al Qaeda, have spawned fierce debate.