Khan warned that the proposed cuts would lead to the loss of thousands of community police officers who "act as the eyes and ears of the security services, providing the intelligence and information that allows us to disrupt attempted terrorist attacks".
Assistant Commissioner Mark Rowley said Butt was known to police and MI5, but because the probe into him did not reveal evidence of attack planning or other serious offending he was prioritised accordingly.
He also used the name Rachid Elkhdar, and claimed to be six years younger.
His accomplice, Rachid Redouane, 30, was not known to authorities. "He has more important things to do than respond to Donald Trump's ill-informed tweet that deliberately takes out of context his remarks urging Londoners not to be alarmed when they saw more police - including armed officers - on the streets", the spokesman had said.
Apple's HomePod speaker pumps up the volume on tech rivals
The HomePod is Apple's first new gadget in almost three years, following its announcement of the Apple Watch in September 2014 . Users will also be available to control smart home products such as connected lighting by speaking to Siri through the HomePod .
Also, at least 20 others have been injured in the attack which comes less than two weeks after 22 people were killed and scores were injured by a suicide bomber at an Ariana Grande concert in the northern English city of Manchester.
Josh Dell contributed to this article. The identities of the assailants have not yet been disclosed for fear of compromising the investigation, though police said they know their names. The campaign roared back into public view Monday after a one-day hiatus, with Prime Minister Theresa May and Labour Party leader Jeremy Corbyn trading blame over one another's security stances.
Her devastated family described the vivacious woman as a devoted daughter and sister.
"Whatever the United States can do to help out in London and the U.K., we will be there", Trump wrote.
The Labour mayor also warned that London would be more risky under Conservative government budget cuts, which could lead to 12,000 fewer police officers.
Bryce Harper's fight with Hunter Strickland led to so many memes
The Giants ended up dropping the game 3-0 and are dropping towards the San Diego Padres at the bottom of the National League West. After the brawl began to simmer down, Strickland's teammates attempted to hold him back and get him to the dugout.
Twenty-one of the 48 people injured in the attack remained in critical condition late Sunday.
He is said to be inconsolable and family members are rushing to his side.
He is the second victim to be named after Canadian woman Christine Archibald who died on London Bridge.
A vigil was held at Potters Field Park by the River Thames on Monday evening to remember the victims.
She said: "While our pain will never diminish, it is important for us all to carry on with our lives in direct opposition to those who wish to destroy us". "If you know Tyler, please be there for him now, and later when what happened sinks in, he's going to need us all".
Apple announces an iMac Pro update and iOS 11
The iMac Pro will feature the new Radeon Pro Vega graphics card and up to 16GB of on-package high-bandwidth memory (HBM2). The new iPad Pro models are available to order now and will ship to customers next week starting 12 June 2017.
The Islamic State terror group, also known as Daesh, has claimed responsibility for the London Bridge rampage, while the attack has sparked fears Britain is in the grip of a spate of copycat incidents. "We're calling for a restoration of police numbers, and there's a call being made for her to go, because of what she's done on the police numbers".
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