Members of Congress reflected on the late President John F. Kennedy’s life Friday and where they were on the day of his assassination 50 years ago.

Senate Majority Leader Harry ReidHarry Mason ReidMcConnell not yet ready to change rules for Trump nominees The Hill's Morning Report — Sponsored by CVS Health — Trump’s love-hate relationship with the Senate Trump to press GOP on changing Senate rules MORE (D-Nev.) tweeted a photo of a letter he received from Kennedy in 1961 in which he thanked people who helped campaign for him.

Dallas planned a remembrance ceremony Friday at Dealey Plaza, the site of the assassination. Texas Rep. Pete Sessions (R) said he was attending.

President Obama asked for flags at all government buildings to be lowered to half-staff Friday.

A number of lawmakers also tweeted they were in school when they heard the news.

Sen. Jay RockefellerJohn (Jay) Davison RockefellerSenate GOP rejects Trump’s call to go big on gun legislation Overnight Tech: Trump nominates Dem to FCC | Facebook pulls suspected baseball gunman's pages | Uber board member resigns after sexist comment Trump nominates former FCC Dem for another term MORE (D-W.Va.) worked at the State Department at the time and said he was in a taxi when he learned Kennedy was shot. He told The Hill the driver pulled over, and they listened to the news on the radio together.

House Minority Leader Nancy Pelosi (D-Calif.) tweeted a link to the commencement address Kennedy delivered at her alma mater, Trinity College, in 1958. Pelosi graduated with her bachelor’s degree in 1962.

Kennedy spoke about the public’s “disdain” for politics in the speech and encouraged the graduates to consider becoming politicians. 

“I would urge therefore that each of you, regardless of your chosen occupation, consider entering the field of politics at some stage in your career.”

This post was updated at 12:52 p.m.