It's been 50 years since the March on Washington and TV networks are planning a lot of coverage Today to mark the event. 

Here is a breakdown of what networks are doing what: 

 ABC News“I Have a Dream” -- four words that helped change the course of American history. ABC News and Yahoo! News will host a first-ever live global broadcast on Wednesday to commemorate the 50th anniversary of Martin Luther King’s March on Washington and his iconic “I Have a Dream” speech. This hybrid digital-television event will be anchored by George Stephanopoulos with Dan Kloeffler from ABC News World Headquarters in New York beginning at 11 a.m. Coverage will be available across all ABC News digital platforms as well as through Yahoo! News. When President Barack Obama speaks from the steps of the Lincoln Memorial, ABC News will simulcast a live special report to the ABC Television Network and to the Yahoo!-ABC News Network.

MSNBC The news channel will present special coverage of the 50th anniversary of the March on Washington on Wednesday. This will include live coverage from both Washington, and New York, with Chris Matthews anchoring live from the National Mall throughout the day beginning at 11a.m. After Obama’s remarks at about 4 p.m., MSNBC will present the Rev. Martin Luther King’s entire "I Have a Dream" speech, with the special hour hosted by Tamron Hall. And Chris Hayes will host a special “All In” at 8 p.m., live from Washington.  “All In” will also air King’s "I Have a Dream" speech with limited commercial interruption, followed by commentary and reflection by Hayes and his MSNBC colleagues regarding the historic nature of King’s words. The limited-commercial presentation has been made possible by Bank of America.

CNN The news channel will observe the 50th anniversary of the March on Washington on Wednesday with a re-broadcast of King's “I Have a Dream” speech. The address from five decades ago will air in its entirety. The day’s coverage will be hosted by CNN anchor Don Lemon, with live reporting from correspondents Joe Johns and Athena Jones in the crowds gathered on the National Mall to participate in the events, and commentary from CNN Crossfire host Van Jones and contributions from CNN’s Donna Brazile.

CBS Evening News Anchor and managing editor Scott Pelley will lead CBS News’ live coverage of the 50th anniversary of the March on Washington including President Barack Obama’s speech from the Lincoln Memorial on Wednesday. Coverage begins on "CBS This Morning" at 7 a.m. with reports on the anniversary, and includes live coverage  of President Obama’s remarks Wednesday afternoon. Pelley will be joined by CBS News Chief White House Correspondent Major Garrett from the White House, CBS News Correspondent Jeff Pegues from the National Mall, and presidential historian and CBS News consultant Douglas Brinkley from Washington, D.C.