President Trump, speaking tonight at the Ford Theatre's annual gala, said he's spoken with British Prime Minister Theresa May to express "our unwavering support" and said the U.S. will do everything in its power to "bring those that are guilty to justice."

"We renew our resolve, stronger than ever before, to protect the United States and its allies from a vile enemy that has waged war on innocent life. And it has gone on too long. This bloodshed must end. This bloodshed will end. As president I will do what is necessary is to prevent this threat from spreading to our shores.