Ask HN: How is the President protected from drones?

There are drone jammers that block radio frequencies and GPS signals in a area making the used drone inoperable. (https://crab.wordpress.com/2010/02/11/how-to-down-a-drone/)

These devices are used at film sets and important buildings which makes it probable that they are a measure to protect the president.

There must be ways this is already covered. I'd be surprised if the president does not already have some level of protection from a mortar being fired where he is due to speak. There must be some kind of mobile in-air intercept method for smaller objects.

Perhaps mini missiles or those gattling guns they have on navy ships. The SS must be able to afford a few vans with these mounted around a perimeter. I just googled mortar defence and they are working on lasers that can stop these in air too.

Source: I know nothing.

My take - it's a growing pain for secret service. My approach - take it out at source/planning/chatter stage. When drone is up in the air at alternative controlled frequency or purely auto controlled with or without GPS - it's a bit too late.

It is an issue.