This is how Secret Service protection has changed for presidents over the years

FILE - A skater rolls past the White House on Pennsylvania Avenue shortly after the thoroughfare was closed to vehicular traffic in May 1995. Protective details have grown in size, responsibility and technology over more than a century of the Secret Service protecting presidents. When the commander in chief leaves the White House, they're accompanied by a phalanx of Secret Service officers and agents. (AP Photo/Joe Marquette, File)

WASHINGTON (AP) — During Abraham Lincoln's presidency, anyone could come to the White House and see him. Come they did: mothers looking to have their sons released from military service, wives urging that their husbands be freed from prison after resisting the draft, others who simply wanted to meet the president.

“Some only wanted comfort in a terrible time, and that he freely gave," wrote in his book "Lincoln’s White House: The People’s House in Wartime."

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