War of the Worlds, will ALS be on Mars?

Usability of 'iPhones' far surpasses ordinary telephones for Amyotrophic Lateral Sclerosis patients so many now use them extensively, however, be prepared for a test of the emergency broadcast system tomorrow; ordinary landline telephones will not be involved in the test . . . their power service might not be up to such a test.

Why everyone’s phone will alarm at 2:20 pm ET on Wednesday
Why you will be getting a cell phone text alert from National Wireless Emergency Alert System | CNN Business
Why you will be getting a cell phone text alert from National Wireless Emergency Alert System | CNN Business

'. . . from 14:20 to 14:50 hours ET . . .' (or 2:20pm until 2:50pm . . .).