Drejka appeared "more angry" than remorseful during the shooting, according to a bystander.
"One of the boxes felt different than the others," the Texas Department of Criminal Justice said.
"The UK would envisage granting permission to EU airlines to continue to operate. We would expect EU countries to reciprocate in turn," the UK government said.
Vice President Mike Pence spoke of the Trump administration's efforts to "protect religious liberty" at the Family Research Council's annual conference.
The dismissal was announced by Dallas Police Chief Reneé Hall on Twitter.