. >> reporter: first sergeant jonathan griffin says every trailer must have working lights. >> most commonly you have a trailer that needs a two inch ball. it goes on easy however when you hit a bump the locking device is too big and it pops off. >> reporter: you must have safety chains to keep the trailer connected even if it pops off the hitch and a pin to lock the hitch in place. that is what was missing from the trailer. >> something that costs $1.79. that's it. that's it. tomorrow 8:35 in the morning and walk through at 4:10. everyone is talking about the redskins don't forget about the nationals. they hadn't lost a series since the all-star break. tonight they are in miami taking on the marlins. the nats lead by a game over atlanta. what has been the key to the recent success? not the usual suspects. they are 4-0 in their four starts. none of the wins have come from strasburg or zimmerman who starts tonight. the offense outscoring opponents 41-27. one is leadoff hitter denard span batting almost .500 since break. the comcast center is no more at least the name. the arena renamed the xf