◼ Gunman opens fire at Navy Yard in Washington; several wounded, officials say - US News
REPORT: 4 killed, 8 injured...
WASHPOST: Three shooters...
3,000 workers told to 'shelter in place'...
NBC: At least 2 cops among victims...
WAR ZONE: SWAT-style teams deployed at Capitol...
Flights halted out of Reagan airport...
WH: 'Citizens: Listen to the Authorities'...
◼ About the shooting location - Greta/FOX
