Trump said he would take steps to ensure cyber security is central to the USA military.
Trump's order temporarily bars citizens of seven majority-Muslim countries from entering the United States even if they hold valid visas or permanent residence permits, a move that caught many companies off-guard.
Demonstrators rallied in New York, Washington, and Boston. They tell the Muslim world that the United States has friends and interests elsewhere; fearless Iraqis and others from the targeted nations who risked their lives to assist US counterterror efforts are now being told to go fend for themselves. With detentions, ACLU lawyers and chaos at airports including LAX, Dulles in DC, DFW in Texas, NYC and more, the order puts a 90-day freeze on travel by citizens of Iran, Iraq, Sudan, Syria, Libya, Somalia, and Yemen. Chants of "Refugees welcome" and "No ban, no wall" echoed outside the airport.
The travel ban covers legal permanent residents - meaning those with green cards - and those with valid travel visas from those nations who were outside the US after Friday.
Trump said he talked about the ban a lot during the campaign and "we're now putting it into effect".
"President Trump's war on equality is already taking a bad human toll", Omar Jadwat, director of the ACLU's Immigrants' Rights Project, wrote on the group's blog. The judge also ordered the federal government to turn over a list of everyone now being detained.
Apple Inc CEO Tim Cook sent a letter to employees saying Trump's order was "not a policy we support" and promised to help affected employees.
"We want to ensure that we are not admitting into our country the very threats our soldiers are fighting overseas".
Protesters filled Whitehall
The Trump team also defended the executive order's implementation amid backlash from some lawmakers and following protests that broke out Saturday and were planned again for Sunday at airports across the country.
What is the "immigration ban?" The Republican-led Congress in 2015 voted to require visas and additional security checks for foreign citizens who normally wouldn't need visas - such as those from Britain - if they had visited the seven countries: Iraq, Iran, Syria, Sudan, Libya, Somalia and Yemen.
Legal permanent residents - green card and visa-holders - from those seven countries who were out of the United States after Friday can not return to the USA for 90 days. It also indefinitely bans Syrians. "He's fully entitled to do this and as far as we're concerned in this country, yes I would like to see extreme vetting", Farage told Andrew Neil on BBC One's Sunday Politics show. That left open the possibility that citizens of other countries could also face a travel ban. He said on Twitter that Mr. Darweesh "spent years keeping US soldiers alive in combat in Iraq". But that year, 618 Iraqis were allowed to enter the USA with that special visa. Foreign government, United Nations, global organization and North Atlantic Treaty Organisation visas are also exempt.
So like Obama's 2011 suspension, both the post-9/11 and African cases were in reaction to immediate issues and limited to refugees. Also officials would continue to process requests from people claiming religious persecution "provided that the religion of the individual is a minority religion in the individual's country".
All together these are unacceptable mistakes, in keeping with the amateurish behavior seen by the Trump administration in its first week in office, have gone a long way to overshadow an executive order that is not out of line with longstanding USA policy.
Foreign nationals who were allowed to board flights before the order was signed Friday were being detained at USA airports and told they were no longer welcome.
Earlier on Saturday, U.S. District Judge Ann Donnelly in New York City's Brooklyn borough ordered authorities to refrain from deporting previously approved refugees from those countries.
Spicer 'Confident' DeVos Will Be Confirmed Despite Some GOP Opposition
She has drawn the fire of teachers unions for her advocacy for charter schools and taxpayer-funded vouchers for private education. Susan Collins of ME and Alaska's Lisa Murkowski are the first Republicans to vote against one of President Trump's Cabinet picks.