President Donald Trump endorses stricter gun-control measures, including raising the minimum age to 21 for possessing a broader range of weapons than at present.

Students galvanised by the deadly mass shooting at a Florida high school confront lawmakers with demands to restrict sales of assault rifles, while President Donald Trump suggests arming teachers as a way to stop more US rampages.

Russian meddling, national mourning for school shooting victims, the chaotic state of Donald Trump's presidency: US political turbulence forms a dramatic backdrop as conservatives gather near Washington for their often controversial annual confab.

Oprah Winfrey, George Clooney and Steven Spielberg says they would each donate $500,000 to the “March for Our Lives” rally in Washington in support of gun control following last week’s shooting at a Florida high school that left 17 dead.

A former student accused of last week’s deadly shooting at a Florida high school returns to court for a hearing in a case that has galvanized advocates of stricter gun control, including many of the rampage survivors.

A former student opens fire at a Florida high school, killing at least 17 people and sending scores of students fleeing into the streets in the nation's deadliest school shooting since a gunman attacked an elementary school in Newtown, Conn.