No way did 50 SS get injured. I think this number comes from various Federal police summoned to help out the Secret Service at/near the White House.
Even this 50 number is too high. I need more proof. BTW Washingtoon DC is positively crawling with various useless eater Federal Police agencies. 25-50 of them. At least they were useful here and yesterday and thanks!
I read elsewhere it was actually 60 injured