US 'must act' on mass shootings: Biden

By Zeke Miller and Chris Megerian
Updated May 25 2022 - 2:41am, first published 2:36am
Flags are at half-mast at the White House following the deaths of 15 people in a US school shooting.

US President Joe Biden has delivered an emotional call for new restrictions on firearms after a gunman opened fire at a Texas primary school, killing 18 children.