>> bret: ups and fedex we're told right now, greg, suspending those packages from yemen. greg, thank you very much. there is also concern tonight over a series of shootings in this part of the country. aimed at buildings associated with the u.s. marine corps. national correspondent steve centanni is following that story. >> another shootings and more worry about security in the d.c. area. the latest attack came overnight when an unknown shooter took aim at the second time 25 miles south of washington. one of three military targets hit since october 17. there have been no injuries and the f.b.i. pointed out all the shootings took place when no one was around. >> we're cognizant of the fact he attempted to avoid casualties by acting in the nighttime, not the business hours. >> all the shootings occurred in a 30-mile radius of each other in the washington, d.c., suburbs. the first one was october 17 at the marine corps museum.