Security Boosted on Subway in Washington after London Attacks

Public transportation officials in the U.S capital have boosted security on local subways and buses in light of the bombings on London's transit system.
A spokeswoman for Washington's transit system (Metro) says more police with bomb-sniffing dogs are now patrolling trains and buses.
Transit officials in Washington are asking riders to be alert and report any unusual activity or suspicious packages.
Some one million people ride Washington's transportation system every day.