washington wide-ranging request document analysis president-elect donald trump transition team ask department homeland security last month assess assets available border wall barrier construction team also ask department capacity expand immigrant detention aerial surveillance program scale back obama administration remain popular immigration hardliners ask whether federal workers alter biographic information keep department immigrants concern civil liberties n't miss megyn kelly leave fox news join nbc reuters tv trump fear grow mexico valley dollar king request make dec. meet trump transition team department homeland security officials accord internal agency memo review reuters document offer glimpse president-elect strategy secure u.s. border reverse police put place obama administration trump transition team comment response reuters inquiries spokeswoman department homeland security u.s. customs border protection decline comment response transition team request u.s. customs border protection staffers identify 400 miles along u.s.-mexico border distance along u.s.-canada border new fence could erect accord document see reuters reuters could determine whether trump team consider northern border barrier campaign trump pledge build wall expand fence part u.s.-mexico border say see need build wall border canada one program transition team ask accord email summary operation phalanx aerial surveillance program authorize 1,200 army national guard airmen monitor southern border drug traffic illegal migration program deploy 6,000 airmen president george w. bush downsize barack obama move blast conservatives argue surveillance vital border security transition team also ask copy every executive order directive send immigration agents since obama take office 2009 accord memo summarize meet trump say intend undo obama executive action immigration include 2012 order allow children bring u.s. illegally parent remain country temporary authorizations allow attend college work program know daca collect information include participants address could theoretically use locate deport policy reverse another request transition team information whether migrant record change reason include civil right civil liberties concern accord internal memo see reuters department homeland security official speak condition anonymity say agency interpret request mean transition team want make sure federal workers tamper information protect daca recipients migrants deportation campaign trail trump vow deport undocumented immigrants promise may prompt transition team request information feasibility expand temporary detention facilities internal memo summarize meet trump transition team u.s. customs border protection say team request comprehensive picture border security well resources available wall barriers department homeland security official say agency representatives attend meet believe request include northern southern border u.s. customs border protection prepare report specific locations cost build fence along u.s.-canada border reuters review copy report estimate cost build fence along northern border fence would 3.3 billion cover 452 miles along border canada state washington idaho montana new york vermont new hampshire maine add 413 miles fence southwest border would expensive accord estimate 11.37 billion would aim keep pedestrians well vehicles cross pedestrian fence require staff would cost 11.2 million per mile versus 4.1 million per mile build build accord report fiscal year 2015 late year data available border patrol agents apprehend 2,626 illegal migrants u.s.-canada border compare 331,333 apprehend u.s.-mexico border exclusive trump team seek agency record border barriers surveillance