Witness: Orlando shooter laughed during rampage

Norman Casiano crawled into a bathroom and wedged himself into a stall, crammed with at least a dozen people. They were hiding, crying and saying prayers under their breath.

Orlando shooting: What motivated a killer?

While the bodies of Omar Mateen's victims were removed from Pulse nightclub overnight, investigators worked Monday to determine what motivated the Florida killer responsible for the worst mass shooting in U.S. history -- a man the FBI knew was sympathetic to terrorism and had previously investigated.

Microsoft to buy LinkedIn for $26 billion

In one of the biggest tech mergers of all time, Microsoft said Monday that it's buying LinkedIn in a deal valued at $26.2 billion.

Trump stretches facts in fiery post-Orlando speech

Donald Trump responded Monday to the worst terror attack since 9/11 with a no-holds-barred attack on Muslims and Hillary Clinton that played loose with the facts and was rife with inflammatory rhetoric.

Second Canadian in Philippines executed by Abu Sayyaf militants

A Canadian national has been beheaded in the Philippines by Islamist militant group Abu Sayyaf after a ransom payment deadline passed, the Philippines government confirmed Tuesday.

Citing Orlando shootings, Rubio opens door to Senate run

Sen. Marco Rubio seemed to open the door to running for re-election Monday, when asked whether the Orlando nightclub shootings had changed his decision not to seek another term.

Orlando shooting: 50 killed, shooter pledged ISIS allegiance

An American-born man who'd pledged allegiance to ISIS gunned down 50 people early Sunday at a gay nightclub in Orlando, the deadliest mass shooting in the United States and the nation's worst terror attack since 9/11, authorities said.

Clinton targets Trump in first general election ad

The general election is here. Hillary Clinton's campaign will air their first general election television ad this week, targeting Donald Trump for comments about violence at his events and mocking a disabled New York Times reporter.

The real terror threat in America is homegrown

The mass killing in Orlando this weekend fits a grim pattern: Every lethal terrorist attack in the United States in the past decade and a half has been carried out by American citizens or legal permanent residents, operating either as lone wolves or in pairs, who have no formal connections or training from terrorist organizations such as al Qaeda or ISIS.

Man hurls explosive device at Shanghai airport, then attempts suicide

Four passengers were wounded after a man hurled an explosive device at a check-in counter at Shanghai's Pudong International Airport on Sunday afternoon, before attempting to kill himself.