Promising never to be defeated in spirit and vowing to defeat terrorists throughout the world, Americans went back to work Monday, six days after the hijacked airplane attacks that devastated the Pentagon and destroyed the World Trade Center.

"We will win the war and there will be costs," President Bush said in a midday visit to the Pentagon, where military planners were readying call-up orders for 35,000 reservists.

"I want justice," said Bush. "There's an old poster out West that said: 'Wanted, dead or alive.' "

Bush cautioned the nation it faces "a different type of war ... a different type of enemy than we're used to. ... Their network is extensive. There are no rules. They slit the throats of women who are on airplanes." 

Asked about his comment about a wanted poster, he replied, "All I'm doing is remembering when I was a kid. I remember they used to put out there in the Old West wanted posters that said 'Wanted dead or alive.' All I want and America wants him brought to justice. That's what I want."

Presidential spokesman Ari Fleischer later said that a presidential directive barring the U.S. government from engaging in assassination "does not limit the United States' ability to act in its self defense."

As Bush vowed that the nation's military would "defend freedom at any cost," Pakistani diplomats halfway around the world traveled to Afghanistan at the urging of the United States, seeking to have Usama bin Laden turned over to American authorities.

Bush reiterated that bin Laden is the prime suspect in last Tuesday's terrorist attacks in which hijacked jetliners were flown into the World Trade Center twin towers in New York and the Pentagon outside Washington. More than 5,000 people may have been killed in the attacks.

"The people who house him, encourage, provide food, comfort or money are on notice," Bush said. "The Taliban must take my statement seriously."

The president spent part of his day trying to reassure the nation's Islamic adherents. Visiting a mosque at the Washington Islamic Center, he observed the custom of removing his shoes and spoke against prejudice. "Islam is peace," he said. "These terrorists don't represent peace."

Elsewhere in the nation:

• Hope of finding survivors in the smoldering ruins of the World Trade Center was dying. By Monday morning, 190 had been confirmed dead in New York; the number of missing was 4,957. In the Pentagon attack, 188 were believed dead. 

Federal emergency workers at both sites were trying to balance the need to move quickly through the rubble with their duty to pluck out any evidence they came across. 

• Attorney General John Ashcroft called for legislation from Congress this week to help authorities track elusive terrorist networks.The legislation would permit authorities to wiretap individuals, no matter what phone they use, and increase current penalties for harboring a terrorist. 

Ashcroft also announced that the administration will place additional armed federal agents aboard commercial airliners. "We need these tools to fight the terrorism threat which exists in the United States," he said.

• FBI Director Robert S. Mueller said the Immigration and Naturalization Service had detained 49 people in the course of the federal investigation into last week's attacks. He also took the unusual step of publicly recruiting for the FBI, saying the agency needs English-speaking individuals with a "professional level in Arabic and Farsi."

On a jarring note domestically, Mueller said the government has begun 40 hate-crimes investigations involving reported attacks on Arab-American citizens and institutions.

• Secretary of State Colin Powell told the people of Afghanistan "we mean no ill." But he said the U.S. campaign against bin Laden might include military action.

With the U.S. drive for worldwide support against bin Ladin's terrorism network gaining ground, Powell said, "All roads lead to the leader of that organization ... and his location is Afghanistan."

Powell said of the Afghans: 'They are a suffering people. They are a poor people. And for that reason alone they should not allow these invaders to put their society at risk."

• The Federal Reserve cut a key interest rate to shore up the economy as the nation grappled with the aftermath of the worst terrorist strike in its history.

• In New York, Wall Street restarted trading just blocks from rescuers trying to find survivors underneath the rubble of the collapsed World Trade Center towers.

"We're going to stick our thumb in the eye of the murderers," Treasury Secretary Paul O'Neill said from the New York Stock Exchange. "We're going to show the world resilience." 

Stocks finished the day with the worst-ever one-day point loss for the Dow industrials. The Dow lost about 684 points — eclipsing the previous one-day point loss mark of 617 points, set in April of last year.

• Major League Baseball was set to being playing again, with six National League games scheduled for Monday night and a full slate of games planned for Tuesday.

All Major Leaguers planned to wear U.S. flags on their caps and uniforms. "God Bless America" was set to replace "Take Me Out to the Ball Game" as the traditional crowd sing-along during the seventh-inning stretch. 

• International pressure on Afghanistan to deliver terrorist mastermind Usama bin Laden, the prime suspect in Tuesday's attacks, was turned up over the weekend. 

A delegation from Pakistan, the Taliban's closest ally, flew to the Taliban's headquarters in the remote Afghan city of Kandahar Monday to demand that bin Laden be given up, or face massive international retaliation. Taliban leaders said earlier they would not surrender him. 

• U.S. officials threatened to unleash America's weaponry if bin Laden is not turned over. 

"The government of Afghanistan has to understand that we believe they have, indeed, been harboring a man who committed and whose organization committed this most egregious act," Vice President Dick Cheney said on NBC's Meet the Press Sunday. 

"They have to understand, and others like them around the world have to understand, that if you provided sanctuary to terrorists, you face the full wrath of the United States of America." 

• On Sunday, bin Laden again denied having anything to do with the attacks. 

Bush shrugged off the denial and said, "No question, he is the prime suspect." 

Bin Laden, an exiled Saudi millionaire, has been indicted in the 1998 bombing of two U.S. embassies in east Africa and has been linked to the 1993 World Trade Center bombing. 

• The President's national security adviser, Condoleezza Rice, said the promised war on terrorism is not just against bin Laden. 

"We're going to follow the evidence trail," she said. "It's not just a single person. It's a large network. Clearly, the trail points in that direction, but we aren't saying that that's all. There may be others. We want to be sure what we're looking at." 

The Associated Press contributed to this report