Jared L. Loughner, head shaved, a cut on his right temple and his hands cuffed, stared vacantly at a packed courtroom Monday and sat down. His attorney, who defended "Unabomber" Theodore J. Kaczynski, whispered to him.
It was the nation's first look at the 22-year-old loner accused of trying to assassinate Arizona Rep. Gabrielle Giffords.
The three-term Democrat lay about 100 miles away in a Tucson intensive-care unit, critically wounded after being shot through the head but able to give a thumbs-up sign that doctors found as a reason to hope.
Loughner seemed impassive and at one point stood at a lectern in his beige prison jumpsuit. A U.S. marshal stood guard nearby.
The judge asked whether he understood that he could get life in prison -- or the death penalty -- for killing federal Judge John M. Roll, one of six people who were killed in the shooting rampage at Giffords' outdoor meeting with constituents Saturday in Tucson.
"Yes," he said. His newly appointed lawyer, Judy Clarke, stood beside him as the judge ordered Loughner held without bail.
Throngs of reporters and television news crews lined up outside the federal courthouse, where the hearing was moved from Tucson.
Hours earlier, the nation observed a moment of silence for the victims, from the South Lawn of the White House and the steps of the U.S. Capitol to legislatures beyond Arizona and the planet itself. At the International Space Station, Giffords' brother-in-law, Scott, the commanding officer, spoke over the radio as flight controllers in Houston fell silent.
"As I look out the window, I see a very beautiful planet that seems very inviting and peaceful," he said. "Unfortunately, it is not. These days, we are constantly reminded of the unspeakable acts of violence and damage we can inflict upon one another, not just with our actions, but also with our irresponsible words," he said.
"We're better than this," he said. "We must do better."
On a frigid morning outside the White House, President Obama and first lady Michelle Obama stood side by side, each with hands clasped, head bowed and eyes closed. On the steps of the Capitol, congressional staff and other employees did the same.
A senior Obama administration official said late Monday that the president will travel to Arizona on Wednesday to attend a memorial service for the victims of the shooting rampage.
At the Supreme Court, the justices paused for a moment of silence between cases they were hearing Monday morning.
Obama called for the country to come together in prayer or reflection for those killed and those fighting to recover.
"In the coming days, we're going to have a lot of time to reflect," he said. "Right now, the main thing we're doing is to offer our thoughts and prayers to those who've been impacted, making sure we're joining together and pulling together as a country."
In all, six people were shot to death and 14 wounded or otherwise injured outside a supermarket where Giffords set up a booth to hear the concerns of constituents. Loughner was tackled to the ground minutes after the shooting began, authorities said. He has been silent ever since.
Among the dead was 9-year-old Christina Taylor Green, who was born on the day of the Sept. 11, 2001, terrorist attacks. Her funeral is Thursday.
It was unclear when funerals will be held for the other victims, including a Giffords aide.
Loughner is charged with one count of attempted assassination of a member of Congress, two counts of killing a federal employee and two counts of attempting to kill a federal employee; all are federal charges.
State prosecutors are researching whether they can proceed with local charges at the same time as the federal case, an official said.
Giffords, 40, was shot in the head at close range. She was in critical condition at Tucson's University Medical Center. Two patients were discharged Sunday night. Seven others remained hospitalized.
Recent CT scans showed no further swelling in the brain, but doctors were guarded in commenting.
"We're not out of the woods yet," said her neurosurgeon, Dr. Michael Lemole said. "That swelling can sometimes take three days or five days to maximize. But every day that goes by and we don't see an increase, we're slightly more optimistic."
After Saturday's operation to temporarily remove half of her skull, doctors over the last two days had Giffords removed from her sedation and then asked basic commands such as: "Show me two fingers."
"When she did that, we were having a party in there," Dr. Peter Rhee said, adding that Giffords has also managed to give doctors a thumbs-up and has been reaching for her breathing tube, even while sedated.
"That's a purposeful movement. That's a great thing. She's always grabbing for the tube," he said. Her doctors have declined to speculate on what disabilities Giffords could face.
With few new details emerging at the hearing, questions remained about what could have motivated someone to arm himself with a handgun and magazines carrying 33 bullets each, and rain gunfire on a supermarket parking lot crowded with men, women and children.
Who exactly is Jared Loughner?
Comments from friends and former classmates bolstered by Loughner's own Internet postings have painted a picture of a social outcast with almost indecipherable beliefs steeped in mistrust and paranoia.
"If you call me a terrorist then the argument to call me a terrorist is Ad hominem," he wrote Dec. 15 in a posting.
A military official in Washington said the Army rejected Loughner in 2008 because he failed a drug test.
Prosecutors say he scrawled on an envelope the words "my assassination" and "Giffords" sometime before he took a cab to the shopping center. Police said he bought the 9mm Glock handgun used in the attack at Sportsman's Warehouse in Tucson in November.