Today's Tweet

CNN

After the attacks in Brussels, the home of NATO and the capital of the European Union, leaders inside Belgium and beyond vowed not to back down in their fight against terror.

In Belgium, where officials declared three days of national mourning, Michel offered a resolute message to those who supported and cheered the attackers.

"To those who have chosen to be barbarous enemies of freedom, democracy and fundamental values ... we remain united as one," Michel said. "We are determined to defend our freedoms and to protect our liberties."

In its message claiming responsibility, ISIS noted that Belgium is one of the nations "participating in the international coalition against the Islamic State."

A Twitter post widely circulated by prominent ISIS backers Tuesday featured the words, "What will be coming is worse."

Do you know how many people are wondering whether those responsible are secular humanists?
None. No one is.
There's a reason for that.

— MrOzAtheist (@MrOzAtheist) March 23, 2016

Belgian authorities say the man in white is one of three suspects tied to the airport attack.

The other two died in the explosions, Belgian Interior Minister Jan Jambon told CNN. But investigators believe the man in white planted a bomb at the airport, then left.

"The third man left a bomb in the airport, but it didn't explode. ... And we are now looking for this guy," Jambon said.

A photograph released by investigators shows the three suspects side-by-side.