Arizona shooting - President Barack Obama and first lady Michelle Obama will travel Wednesday to Tucson, Arizona, and take part in a memorial service for the six people killed by a gunman at a public meeting hosted by Rep. Gabrielle Giffords, who was severely wounded. The president is expected to speak at the service.

The U.S. House of Representatives will consider a resolution that honors Giffords, who remains in intensive care. The resolution also reaffirms the First Amendment rights of assembly and petition as "bedrock principles" of American democracy. It recognizes the other victims of the shooting and applauds those who subdued the gunman and assisted the victims.

Blizzard in Northeast U.S. - Weeks after a blizzard halted planes and dumped mounds of snow on the Northeast, travelers in New York and New England will get an encore Wednesday, with more snow expected and flight cancellations piling up.

A winter storm that turned roads into ice rinks in the Southeast - coupled with a storm from the Plains - could leave 12 to 16 inches of snow in Boston and 8 to 12 inches of snow in New York City by late Wednesday.

As of Wednesday morning, every state except Florida has snow on the ground, including Hawaii. Check travel delays and the weather with CNN.com's travel tracker.

Waiting game in Brisbane - In an event that being compared to Hurricane Katrina, residents and officials in Brisbane, Australia's third-largest city, are watching floodwaters rise. The flooding of the Brisbane River threatens to exceed the damage done by the record 1974 floods, which killed 14 people and destroyed 6,000 homes.

"We are preparing for the worst natural disaster in our history," said Queensland Premier Anna Bligh.

Models predict that 19,700 homes will be "completely flooded" in Brisbane, which is home to more than 1 million residents, and another 4,000 homes are likely to be affected in Ipswich, Bligh said.

Earthquake anniversary - Haiti's devastating earthquake struck a year ago Wednesday. Despite pledges of massive international aid, the impoverished country remains in ruins, with millions living in tent cities amid mountains of rubble.

A Catholic Mass was to be held Wednesday morning, followed by a memorial service at noon in Port-au-Prince's main square. A moment of silence will be observed at 4:53 p.m., the time the quake occurred.