Pentagon chief lands in Baghdad

Mr Gates is on his eighth trip to Iraq since succeeding Donald Rumsfeld

US defense secretary Robert Gates is in the Iraqi capital, Baghdad, on a previously unannounced visit.

He is expected to oversee a ceremony at which Lt-Gen Ray Odierno will take over command of US troops in Iraq.

Gen Odierno will replace Gen David Petraeus, who is moving to a new job in charge of US forces in the Middle East and Horn of Africa.

Last week, Mr Gates said the Iraq war had reached its end-game, but the US should be wary about troop withdrawals.

He is expected to hold talks with Iraqi officials, in what is his second trip in eight months and his eighth since becoming Pentagon chief in December 2006.

Washington and Baghdad are negotiating a controversial security pact that will govern the US troop presence in Iraq when a UN mandate expires at the end of 2008.

Maintaining pressure

“The challenge, I think, for Gen Odierno is: How do we work with the Iraqis to preserve the gains that have already been achieved, expand upon them, even as the numbers of US forces are shrinking,” Mr Gates told reporters on his flight to Baghdad.

He added that Iraqis must move forward with reconciliation between Shia Muslims, Sunni Arabs and Kurds

“There’s still people who would like to see this fail and the important thing will be to keep the pressure on all of them,” he said.

Violence has decreased in Iraq under Gen Petraeus’s strategies, which included a surge of US troop numbers to implement crackdowns on insurgents.

Mr Gates praised Gen Petraeus as “the hero of the hour” but said those working for him who put his plans into action were also “heroes”.

Correspondents say he was aided by factors such as the decision of former Sunni insurgents to turn against al-Qaeda and a ceasefire by the Mehdi Army militia.

US marks seventh 9/11 anniversary

New York has paused to remember the times two planes struck the World Trade Center on 11 September 2001 – an attack that killed nearly 3,000 people.

Four moments of silence are being held to mark the times when four hijacked passenger planes hit the Twin Towers, the Pentagon and a Pennsylvania field.

Presidential candidates Barack Obama and John McCain are attending a ceremony at Ground Zero in New York.

President Bush dedicated a new memorial at the Pentagon, where 184 died.

New York City Mayor Michael Bloomberg opened Thursday’s memorial event at Ground Zero, where families of the victims read out a roll call of those who died.

The attacks, which triggered the US-led invasions of Afghanistan and Iraq and the Bush administration’s war on terror, are regarded as the defining moment of President George W Bush’s time in office.

At the Pentagon, he paid tribute to the acts of courage shown by Americans seven years ago, saying: “The worst day in America’s history saw some of the bravest acts in America’s history.”

A flag was raised over the Washington memorial, which was built at a cost of $22m (£12.6m) on a 1.9-acre (0.77-hectare) parcel of land within view of the crash site.

The president was joined in the US capital by Defense Secretary Robert Gates and his predecessor, Donald Rumsfeld.

Mr Bush had stood earlier for a moment of silence with First Lady Laura Bush on the White House lawn at the time the first plane hit the World Trade Center.

It is the last time Mr Bush marks the anniversary as president.

“The president thinks about 9/11 every single day when he wakes up and before he goes to bed,” White House press secretary Dana Perino said on the eve of the anniversary.

‘Put aside politics’

Senators Obama and McCain, the Democratic and Republican nominees in November’s election, will appear together at Ground Zero in the afternoon to lay wreathes in honour of the victims.

11 September 2001 is a day many around the world will never forget

In a joint statement from the campaigns announcing their decision to visit Ground Zero together, the two men vowed to come together “as Americans” and suspend their political campaigns for 24 hours.

“We will put aside politics and come together to renew that unity, to honour the memory of each and every American who died, and to grieve with the families and friends who lost loved ones,” the statement said.

Their appearance is to be followed by another in the evening at a Columbia University forum to discuss their views on public service.

The ceremony in downtown Manhattan is marking the times when the planes hit the Twin Towers, and when each tower fell – pausing for silence at 0846, 0903, 0959 and 1029.

Family members and students representing the 90 countries that lost people in the attacks also read out the names of all the 2,973 dead.

Seven years after the attacks which shocked the world, Ground Zero is a construction site.

9/11 MEMORAIL TIMETABLE 1340BST: New York World Trade Center ceremony begins 1346: Moment of silence (time first plane hit North Tower) 1346: President Bush has moment of silence at White House 1403: Moment of silence (time second plane struck South Tower) 1430: Mr Bush in Washington for 9/11 Pentagon Memorial dedication 1459: Moment of silence (time South Tower fell) 1529: Moment of silence (time North Tower fell) 1545: Members of Congress gather on the West Steps to honor those killed and injured on 9/11

After years of delays and disagreements over how to commemorate the dead, work has finally begun on a memorial and a new skyscraper – the Freedom Tower – which is due to be completed by 2012.

On Wednesday, Mr Bloomberg called for the abolition of the WTC planning agency, saying the reconstruction was “frustratingly slow”.

“Most important, the memorial must be completed by the 10th anniversary. No more excuses, no more delays,” he added.

On the eve of the anniversary, a top US military commander warned new tactics were needed to win the conflict in Afghanistan, which the US and its allies invaded three months after 9/11.

They aimed to topple the Taleban and hunt down Osama Bin Laden, who the US believes masterminded the attacks.

Admiral Mike Mullen believes insurgents are launching attacks from neighboring Pakistan, and US-led forces must target their “safe havens” in that country.

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