20 years after the Columbine rampage: This is how we party, such as the death of

20 years Ago, shot and killed two teenagers at Columbine High School twelve of their classmates and a teacher. For many people, the memory of the day is a torment, they will not break almost.

Martina Buttler, ARD-Studio, Washington

you don't need an entry in the calendar to remember the day. It is a day would stress the Michael Shoels prefer from the calendar. His son Isaiah was shot and killed at Columbine High School. 20. April is a particularly hard day: "This is how the death celebration," he says. "His birthday on November 4. August, we celebrate. 20. we try, as far as it goes from the thing."

roses will remind, at the commemorative ceremonies in the year 1999 to the victims of the killing spree of Columbine.

In Columbine High School, it is officially a "day of volunteer service". On the anniversary of former pupils and teachers will meet behind closed doors. In the afternoon there will be a public event at the memorial behind the school.

Only a few meters away from the school, behind the sports fields, is the memorial. A circle with inscriptions of the victims is the centre, around it a wall with Statements from students, parents, teachers. "I had no answers".

"I think that this will be the last public commemoration, we do," says the former school principal, Frank De Angelis. "It is interesting that, for example, to Parkland so not a big commemoration was made." At Columbine High School, you've made it to the first, second, third, fifth and tenth anniversary and now again. "The others have done this in private," says De Angelis. "From that we can learn."

"light at the end of this dark, intricate tunnel"

Heather Martin noted for weeks that the Recall of these 20. April will be tough. You will go in your old school, but you want to commit to anything. When it comes to her that day was really bad, she wants to have the possibility to cancel all upcoming shows. For as the day is, you never know - the experience has made Heather in the past 20 years, often enough:

"The 15. Anniversary was one of the easiest I've ever experienced. 16. was quite okay. 17. I was completely finished. You never know before."