president trump is on his first international trip as commander in chief. the president has planned visits to saudi arabia, israel, italy, and the vatican, brussels for a nato meeting and sicily for a g7 meeting, and c-span has plans to cover some of the president's evens overseas this weekend before he arrives back in washington on may 27th. and this afternoon, a briefing with defense secretary james mattis and joint chiefs of staff chair general joseph dunford on the continuing fight against isis. they'll speak to reporters at the pentagon and it starts live at 1:00 p.m. eastern on c-span2. and tonight, an encore q & a with roger ailes, who died this week at the age of 77. the interview was from 2004, and

the founder and chairman of fox news talked about journalism, his former career in politics, and the success of the fox news channel. see q & a tonight at 8:00 p.m. eastern on c-span2. this weekend on american history tv on c-span3, saturday at 10:00 p.m. eastern on reel america, a 50-year-old cbs broadcast with new york senator kennedy and california governor ronald reagan taking questions via satellite from students in london. >> in england, there is a growing movement for legislation against racial discrimination. would both candidates like to comment on that and what we may learn from america's experience? >> we're dealing with a heritage of 150 years. we have been injust to the minority groups and particularly the negroes and some other groups, mexican americans, the indians, and we have just begun to recognize it and now we're

starting to deal with it. >> at 8:00, georgetown university professor brian taylor on the military strategy and political goals of emancipation during the civil war. >> the idea that a president in the event of a sectional war over slavery and a rebellion of the southern states might have the authority to emancipate slaves as a military measure predates the civil war. it is not a new idea. it's arctic latted by john quincy adams on a number of occasions. >> sunday at 6:45 p.m. eastern, history professor talks about the first u.s. congress's 1790 debate on slavery and race. >> in a series of petitions that generated this heated debate, anti-slavery activists and especially the pennsylvania abolition society put forth a vision of a new nation that imagined a racially inclusive republic where the basic rights of enslaved africans were respected. >> and at 8:00, on the presidency, history professor and author charles strozer on

letters exchanged between lincoln and friend speed. >> for two men to talk about the everlastinging love for each other was normal and encouraged, to be expressive about intimacy and connection and even love. and i think that's the way to see this relationship. as long as the boundary against sexuality was absolutely and strictly maintained. >> for complete history tv schedule, go to c-span.org. join us this weekend for our cities tour to trenton, new jersey, with the help of our comcast partners book tv and american history tv feature the history and literary culture of new jersey's capital city. on saturday, on book tv, we visit the state library's rare book collection. >> this 1728, a temporary printing press was set up in burlington, new jersey, in order

to print paper money for the colony and the legislature wanted it close so they could oversee the printing of the money and at the time they did that they also did this book so this is the first known printed book within new jersey. >> and a conversation with william kidder, author of "crossroads of the revolution: trenton, 1774 to 1783." >> washington spent more time in new jersey than any other state during the revolution and his army spent a lot of time here. and the important thing to him was to just keep the revolution going and keep the army in the field. and i believe that new jersey in general and trenton in particular was very instrumental in helping him accomplish that goal. >> and sunday at 2:00 p.m. on american history tv, we tour the new jersey state capitol building which houses one of the

oldest legislatures in the country, followed by trenton, new jersey's, impact on the industrial revolution with a look at some of america's most iconic bridges. >> they are part of the very fabric of what makes trenton trenton and so when you drive across the trenton makes bridge and you see from the other side that sign that says trenton makes the world takes, the road was evidence of this. >> watch c-span cities tour of trenton, new jersey, saturday 5:15 p.m. eastern and sunday 2:00 p.m. on american history tv on c-span3. working with the cable affiliates and visiting cities across the country. next, a testimony from admiral michael rogers, the director of national security agency, on the current state of worldwide cyber threats. he spoke about his priorities and goals toward making his command and agency as efficient and