Brussels Remains on High Alert

The military presence in Brussels appeared lighter on Tuesday as schools prepared to reopen on Wednesday, Nov. 24, 2015.

Police and soldiers guard Brussels' main train station, which is still open for passengers coming in from out of town, Nov. 24, 2015.

Belgian tourism businesses said they have been receiving numerous calls from people canceling their visits in December. Photo taken Nov. 24, 2015.

Tanks were moved from Brussels' famed Grand Palace on Tuesday, but a few armed soldiers remain, Nov. 24, 2015.

With the city at its highest state of alert, the streets of Brussels, normally packed with tourists, were quiet, Nov. 24, 2015.

Soldiers are expected to stay on the streets of Brussels throughout the week despite the government's promise of a return to normalcy beginning Wednesday. Photo taken Nov. 24, 2015.

Despite remaining at the highest security alert levels, Brussels prepares for its annual Christmas markets, Nov. 24, 2015.