"God Bless the USA” singer Lee Greenwood pulled out of the annual NRA Convention this weekend in Texas following the Uvalde, Texas mass shooting earlier this week. Greenwood told FOX News, “That weapon killed kids.” FOX News reported: TRENDING: WATCH: Mother of Uvalde Shooter Speaks Out: 'He Had His Reasons For Doing What He Did and Please Don’t Judge Him' Lee Greenwood said Friday that performing at this weekend’s NRA convention would be an “endorsement” just days after the Uvalde, Texas school shooting.