Aftermath: Prayer, grief and devastation

President Bush speaks at Washington services to families of attack victims: "You are not alone"

(CNN) -- President Bush and four ex-presidents shared the spotlight on Friday at Washington National Cathedral for a service of remembrance for the victims of Tuesday's unexpected terrorist attacks in New York and Washington and their families.

Former Presidents Clinton, Bush (the current president's father), Carter and Ford joined hundreds of political and spiritual figures for a National Day of Prayer and Remembrance.

Meanwhile, federal law enforcement sources told CNN the suspected names used by 19 hijackers who authorities believe commandeered four commercial airliners on Tuesday in a coordinated attack on two renowned symbols of American power.

Law enforcement sources told CNN that they are checking the names against lists of people associated with known terrorist groups.

Bush designated Friday a day of "National Prayer and Remembrance," and asked that Americans head to their places of worship at lunchtime to pray for victims and their families.

Dorise Wondrely, center, niece Rachel Thompson and her daughter Chelsey Leeper, right joined hundreds of students at the University of New Mexico for a candlelight vigil.

Many European nations observed three minutes of silence Friday at 6 a.m. EDT.

A pair of hijacked commercial airliners plowed into the twin towers of the World Trade Center on Tuesday, followed a half an hour later by another hijacked jet that hit the Pentagon in Washington. A fourth jet hit the ground in rural Pennsylvania.

The list of people missing in New York is approaching 5,000; in Washington nearly 200 people are believed dead. All 45 people aboard the jet that crashed in Pennsylvania died.

Latest developments

MORE STORIES Families of the missing clutch photos -- and hope   President Bush addresses prayer service     EXTRA INFORMATION What happened? -- a map of the attacks   Info on the 767, Pentagon and World Trade Center     MORE STORIES • Day 3: U.S. targets terrorist suspects   • World mourns attack victims   • Day 2: Search for survivors grinds on after terrorist attacks   • Day 1: Attacks hit U.S.

• Following the prayer service, Bush was to go to New York to see for himself the devastation inflicted on lower Manhattan by Tuesday's attacks.

• Bush gives the Defense Department the go-ahead to call up to 50,000 reservists for "homeland defense." Governors in 31 states have already called up 10,000 National Guard troops.

• By a 96-0 vote, the U.S. Senate passed a $40 billion emergency spending measure to combat terrorism and help recovery efforts in New York and Washington. The House, as it was voting on the measure, paused midway and will resume voting following National Day of Prayer and Remembrance services.

• The Senate also passed a resolution authorizing the president to use force to retaliate against the terrorist attacks. The vote was 98-0.

• Both the flight data and cockpit voice recorders from the hijacked jet that hit the Pentagon were recovered overnight, officials told CNN. On Thursday, searchers found the flight data recorder from the Pennsylvania crash.

• At least eight people were arrested Thursday at airports in New York because of new security measures -- including four people who were seen at one airport before Tuesday's terrorist attacks. All but one were later released. Sen. Joseph Biden, chairman of the Senate Foreign Relations Committee, said there is "no evidence" that anyone has been involved in a second wave of attacks like Tuesday's.

• A fire flared up again Thursday night at the Pentagon, the flames shooting out of the top of the section that crumpled after a hijacked jet plowed into it Tuesday.

• U.S. stocks will begin trading at 9:30 a.m. ET, Monday, six days after terrorists fatally attacked the financial center of the world, market officials said. The resumption will bring an end to a four-day trading suspension, the longest since World War I, as officials weighed safety against the need to return to the business of Wall Street.