New concerns tonight about violence on summer vacation. And a sale so popular it triggered mayhem. Lines wrapped around malls. Thousands of disappointed kids turned away. Announcer this is nbc nightly news with lester holt. Good evening as we welcome our viewers in the west. President trump is in london tonight with a swirl in his wake in brussels over what was and wasnt agreed to at this weeks nato meetings. To hear the president tell it, it was mission accomplished, that he successfully squeezed his european counterparts to spend even more on defense. But some of those allies are pushing back, offering a different account tonight. This evening, the president and first lady are being hosted by britains Prime Minister theresa may and her husband as the two leaders prepare for their own tough talks amidst the u. K. s political turmoil. Nbcs Kristen Welker is in london tonight. Kristen, good evening. Reporter lets tester, good evening to you. President trump may be in britain but some ke