France's interior minister has said Lt. Col. Arnaud Beltrame performed an "an act of heroism."
"Let us pray with our legs, let us march in unison to the rhythm of justice, because I say enough is enough," said one Parkland shooting survivor.
A spring storm excited Southern California, but experts say it did little to change long-term drought conditions.
The White House says retaining troops who may require substantial medical treatment "presents considerable risk to military effectiveness and lethality."
Britain is investigating whether Facebook, the world's largest social media network, did enough to protect data.