The three sought to attack police or a military target in Britain.
We could see women play a greater role in attack plots in the West, writes Devorah Margolin.
New report calls for a public inquiry into Riyadh's role in exporting "bigoted Wahhabi ideology."
The jihadi asked a British spy for a nail bomb he wished to use on a packed crowd in London.
Without the oxygen of publicity, the attacker is just that: a killer with a car and a knife. The lone wolf needs the pack as much as the pack needs the lone wolf.
Monday's attack targeted worshippers from an institution with a proud history of fighting violent extremism.
"This is what they want. This is what they are aiming for."
The border between Poland and Lithuania is strategically important because its seizure would cut off the Baltic states from the rest of the Western alliance.
Figures released by Mayor of London Sadiq Khan show as many as 20 incidents per day.
Khuram Butt and Rachid Redouane were "warned about their conduct" after wrestling in the water.
The final opinion polls show a healthy lead for the Conservative Party but were badly wrong two years ago.
U.S.-U.K. relations have become a hot topic during the general election campaign.
The divisions in the East End community have turned it into a flashpoint between white nationalists and radical Islamists.
Police have already named the other two attackers as Khuram Butt and Rachid Redouance.
After the third attack in less than three months, Prime Minister Theresa May said Thursday's election would go ahead.
The arrests were made in connection with Saturday's attack that killed seven.
Across the Arab world, changing demographics, a lack of basic rights and Western interventions all drive young people toward extreme violence.
Suicide bomber Abedi was one of 20,000 people known to MI5 but not one of the 3,000 people under active investigation.