Donors pledge more than $6 billion to tackle Syria's crisis
European Union foreign policy chief Josep Borrell speaks during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

European Union foreign policy chief Josep Borrell speaks during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

Mar. 30, 2021 09:48 AM EDT
European Union foreign policy chief Josep Borrell listens to a question during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

European Union foreign policy chief Josep Borrell listens to a question during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

Mar. 30, 2021 09:39 AM EDT
European Union foreign policy chief Josep Borrell speaks during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

European Union foreign policy chief Josep Borrell speaks during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

Mar. 30, 2021 09:44 AM EDT
European Union foreign policy chief Josep Borrell listens to a question during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

European Union foreign policy chief Josep Borrell listens to a question during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

Mar. 30, 2021 09:39 AM EDT
European Union foreign policy chief Josep Borrell listens to a question during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

European Union foreign policy chief Josep Borrell listens to a question during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

Mar. 30, 2021 09:41 AM EDT
European Union foreign policy chief Josep Borrell speaks during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

European Union foreign policy chief Josep Borrell speaks during an online joint news conference with UN Under-Secretary General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock at the conclusion of a conference 'Supporting the future of Syria and the region' at the European Commission headquarters in Brussels, Tuesday, March 30, 2021. (AP Photo/Francisco Seco, Pool)

Mar. 30, 2021 09:48 AM EDT