Speaking of attacks on public transportation, following the deadly subway bombing that rocked Moscow yesterday, Muni and BART have ramped up security. Dogs made their way through BART trains yesterday, "sniffing for anything out of the ordinary," and Muni police were on alerts (well, sort of) after suicide bombers "conducted brazen attacks a day earlier that killed 39 people" during rush hour attacks in Moscow.

"BART's nearly 200 police officers recently finished specialized terror training," notes KTVU. "But the agency says even those officers--and the 2,800 or so workers who've been trained to look out for anything suspicious-- aren't enough to keep an eye on every part of the system at once." Which is why you should keep an eye out for suspicious activity, folks.