ron faucheux, dr.ler, thank you for failing in the blanks today on "the washington busininess report." up next, an explanation of our numberer of e we 520 >> welcome back. our number of the week is 520 but were talking in the millions. that is the value of thbig winner of the top-10 construction projects inhe construction area. $520 million is how much it will cost to build the mriott marquee hotel in the district. the bigget prproject in the strict is in arlington, with the e region's tallest skyscraper, and then in maryland and a w building is g going up in silver spri for t fda. that is all l this week. before you go, we will remind you you have options on twitterer or on facebook for "the washington business report" d you can watch the entire show o on wj.comom by clicking tthe business tend. we will see you next sunday. thank you for joining us. ♪ ♪ ♪ ♪ [ multiple sounds making melodic tune ] ♪ ♪ [ male announcer ] at northrop grumman, every innovation every solution comes together for a single pu