HTML Email - iPhone is not displaying 2 out of 3 images Options

[prolyfic]

Hello all! I am running into an issue with an HTML email I built using BeePro (I am not a coder, but was requested to make an email).

I sent the HTML to someone and they said the header image loads, but the other images don't. I have attached what it correct and incorrect for how it is supposed to look.


Below is the code for one of the images. I imagine whatever is found that is wrong I can adjust in the other image's code as well. If the below code is not enough, I have also attached the full HTML.

<td class="column column-2" width="58.333333333333336%" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt; font-weight: 400; text-align: left; vertical-align: top; border-top: 0px; border-right: 0px; border-bottom: 0px; border-left: 0px;">
<table class="image_block block-2" width="100%" border="0" cellpadding="0" cellspacing="0" role="presentation" style="mso-table-lspace: 0pt; mso-table-rspace: 0pt;">
<tr>
<td class="pad" style="padding-bottom:10px;padding-left:20px;padding-right:20px;padding-top:35px;width:100%;">
<div class="alignment" align="center" style="line-height:10px"><a href="https://reg.hanleywood.com/rf/349552/6750112/s/emlalert0803/a/8265/" target="_blank" style="outline:none" tabindex="-1"><img class="big" src="https://i.imgur.com/4gHq1sv.jpg" style="display: block; height: auto; border: 0; width: 339px; max-width: 100%;" width="339" alt="Speakers: Rosa Sheng, Kimberly Dowdell, Royce Epstein" title="Speakers: Rosa Sheng, Kimberly Dowdell, Royce Epstein"></a></div>
</td>