LONDON _ The London Bridge terrorist attack was the third since Conservative Theresa May became prime minister and the second during campaigning for Thursday's U.K. general election.
Her "enough is enough" address to the nation Sunday morning marked a change from her previous responses to terrorism. She was overtly political.
"While we have made significant progress in recent years, there is � to be frank � far too much tolerance of extremism in our country," May said in a veiled criticism at her main rival, the Labour Party's Jeremy Corbyn.
After the bombing at a concert in Manchester, England, Corbyn suggested that Britain's intervention in wars abroad had fueled the risk of terrorism at home.
While it is unclear how Saturday's attack and its aftermath might affect the election, the unspoken convention that deadly terrorist attacks shouldn't be used in political campaigns has been been abandoned. May said the time had come to have "some difficult, and often embarrassing, conversations."
Here is a guide to how May and Corbyn responded to each attack, and what _ if any _ was the fallout:
��March 22 Parliament attack: A lone attacker drove his car across Westminster Bridge, mounting the sidewalk and mowing down pedestrians before running into the precincts of Parliament and stabbing a police officer. He was shot dead. Five other people died. May, who was in the House of Commons at the time of the attack, convened the government's emergency Cobra committee and appeared that evening outside her central London office to make a statement. She said not to allow the "voices of hate and evil to drive us apart."
May's message: "Tomorrow morning, Parliament will meet as normal. We will come together as normal. "Londoners _ and others from around the world who have come here to visit this great city _ will get up and go about their day as normal. They will board their trains, they will leave their hotels, they will walk these streets, they will live their lives."
What Corbyn said: "I know that Londoners and people across the country will stand together in defense of our values and diversity."
��May 22 Manchester bombing: The British-born son of Libyan refugees detonated a bomb in Manchester as teenagers, parents and their young children left a pop concert. Twenty-two people died. May stayed up most of the night coordinating the response to the attack and appeared outside her residence the next morning and later in the evening to announce that the nation's threat level would be raised to "critical," the highest.
May's message: "We will take every measure available to us and provide every additional resource we can to the police and the security services as they work to protect the public. And while we mourn the victims of last night's appalling attack, we stand defiant. The spirit of Manchester and the spirit of Britain is far mightier than the sick plots of depraved terrorists, that is why the terrorists will never win and we will prevail."'
What Corbyn said: "This is an appalling act of violence against people, and it must be totally and unreservedly and completely condemned. We must support those people who have suffered so much. In these circumstances we have to come together."
��May 26 Campaign hiatus: Campaigning was then suspended for three days and, when it restarted, Corbyn delivered a speech on U.K. foreign policy in central London. "The 'war on terror' is simply not working," he said as he made the case for an overhaul of foreign policy and criticized May's government for squeezing police budgets.
"Many experts, including professionals in our intelligence and security services, have pointed to the connections between wars our government has supported or fought in other countries, such as Libya, and terrorism here at home," said Corbyn, a long-time critic of U.K. foreign interventions, said.
At a meeting of Group of Seven leaders in Sicily, May was swift and brutal in her response as polls showed her lead slipping. "I have been here today at the G-7 working with other international leaders to fight terrorism. At the same time Jeremy Corbyn has said that terror attacks in Britain are our own fault," May said, breaking with the show of cross-party unity after the attack.
"The choice people face in the general election has just become starker," she said. "It's a choice between me working constantly to protect the national interest and working for security and Jeremy Corbyn who frankly isn't up to the job."
���Election Home Stretch: On Friday, in a question-and-answer session on BBC television, Corbyn was repeatedly asked about his not condemning bombings by the Irish Republican Army, which carried out a series of attacks in Britain. He was not asked about Islamist extremism.
The next day, a van drove into pedestrians in central London. Three men with fake suicide vests began to stab people. Seven were killed before the three attackers were shot dead by police, eight minutes after they were called.
This time, May cut to the chase about the need to have "some difficult and often embarrassing conversations."
Corbyn said: "I can't recall any other election where there has been anything like this. This has got to be the worst."
