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Credit: ASSOCIATED PRESS/Manuel Balce Ceneta

High security costs scuttle DC’s St. Patrick’s Parade

Hundreds of TSA screeners, working without pay, calling out sick at major airports

See Dulles airport’s new facial recognition system in action

EXCLUSIVE: DC United offering free tickets to fans hassled by bag policy

National Zoo expands security for spring break

Law enforcement prepares for July 4 events on National Mall

More security

The unseen investment in keeping American sporting events safe

Traffic, security costs to ramp up with National Harbor casino opening

Local police agencies heighten vigilance after NYC bomb blasts

Capitol lockdown lifted after false alarm

Tossed container prompts lockdown at White House (photos)

More households reconsidering how they use the Internet

After Brussels attacks, D.C. bolsters security

Are hackers feasting on your medical records?

#HomelessatHoward student offered place to stay after breaking rules