"The worst of humanity was on display in Manchester last night."
More than a dozen victims had been identified in the press as of Wednesday afternoon.
Speaking in Jerusalem the U.S. president also said Iran needed to cease funding of terror organizations.
The Palestinian militant group said the president had distorted its image by linking it with terror and said it showed his bias toward Israel.
The Anti-Defamation League's new report, "A Dark and Constant Rage," chronicles 25 years of right-wing terrorism in the U.S.
The Trump administration is likely to include some European countries in the in-cabin ban on gadgets larger than cellphones.
Washington considers Abu Mohammed al-Jolani to be one of the world's most wanted extremists.
The DHS would not confirm Wednesday whether an announcement revising its March policy, which targeted 10 Middle Eastern and African airports, was coming.
ISIS published an article titled "Just Terror Tactics" that, in part, describes how fighters can obtain weapons in the U.S.
Turkey and India's leaders pledged tightening economic and counterterrorism ties.
Trump called NATO "obsolete" before concluding it was "no longer obsolete" last month.
The Washington, D.C. area will Wednesday hold its first exercise preparing for a Paris-style terror attack.
The Al-Qaeda-affiliated militant group controls parts of Somalia and wants to impose its hardline version of Islam on the country.
Pope Francis is expected to address the International Peace Conference in Cairo at the end of April.