NASA Mission Control during the final 24 hours of the Apollo 13 mission. 
From the Wikipedia page: 

Finally, the crew jettisoned the Lunar Module Aquarius, leaving the Command Module Odyssey to begin its lone re-entry through the atmosphere. A normal lunar re-entry was accompanied by four minutes of communications blackout caused by ionization of the air around the Command Module. The possibility of heat shield damage had been feared from the explosion, heightening the tension of the blackout period, which took 33 seconds longer than normal.

This kind of stuff fascinates me. 

NASA Mission Control during the final 24 hours of the Apollo 13 mission. 

From the Wikipedia page

Finally, the crew jettisoned the Lunar Module Aquarius, leaving the Command Module Odyssey to begin its lone re-entry through the atmosphere. A normal lunar re-entry was accompanied by four minutes of communications blackout caused by ionization of the air around the Command Module. The possibility of heat shield damage had been feared from the explosion, heightening the tension of the blackout period, which took 33 seconds longer than normal.

This kind of stuff fascinates me. 

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